diff --git a/database/migrations/2016_06_16_000000_create_support_tables.php b/database/migrations/2016_06_16_000000_create_support_tables.php
index a063f16276..d1580d5f4d 100644
--- a/database/migrations/2016_06_16_000000_create_support_tables.php
+++ b/database/migrations/2016_06_16_000000_create_support_tables.php
@@ -77,7 +77,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'account_types',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->string('type', 50);
@@ -99,7 +99,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'transaction_currencies',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -124,7 +124,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'transaction_types',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -147,7 +147,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'jobs',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // straight from Laravel
                         $table->bigIncrements('id');
                         $table->string('queue');
@@ -173,7 +173,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'password_resets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // straight from laravel
                         $table->string('email')->index();
                         $table->string('token')->index();
@@ -193,7 +193,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'permissions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->string('name')->unique();
@@ -214,7 +214,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'roles',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->string('name')->unique();
@@ -235,7 +235,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'permission_role',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('permission_id')->unsigned();
                         $table->integer('role_id')->unsigned();
 
@@ -258,7 +258,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'sessions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('id')->unique();
                         $table->integer('user_id')->nullable();
                         $table->string('ip_address', 45)->nullable();
@@ -280,7 +280,7 @@ class CreateSupportTables extends Migration
             try {
                 Schema::create(
                     'configuration',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2016_06_16_000001_create_users_table.php b/database/migrations/2016_06_16_000001_create_users_table.php
index 7d3d372efa..5002e26302 100644
--- a/database/migrations/2016_06_16_000001_create_users_table.php
+++ b/database/migrations/2016_06_16_000001_create_users_table.php
@@ -54,7 +54,7 @@ class CreateUsersTable extends Migration
             try {
                 Schema::create(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->string('email', 255);
diff --git a/database/migrations/2016_06_16_000002_create_main_tables.php b/database/migrations/2016_06_16_000002_create_main_tables.php
index 1a94293c6a..2a0208a514 100644
--- a/database/migrations/2016_06_16_000002_create_main_tables.php
+++ b/database/migrations/2016_06_16_000002_create_main_tables.php
@@ -96,7 +96,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'accounts',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -121,7 +121,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'account_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('account_id', false, true);
@@ -143,7 +143,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'piggy_banks',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -168,7 +168,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'piggy_bank_repetitions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('piggy_bank_id', false, true);
@@ -191,7 +191,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'attachments',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -224,7 +224,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -258,7 +258,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'budgets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -278,7 +278,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('budget_id', false, true);
@@ -298,7 +298,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'limit_repetitions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('budget_limit_id', false, true);
@@ -321,7 +321,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'categories',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -346,7 +346,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'preferences',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('user_id', false, true);
@@ -369,7 +369,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'role_user',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('user_id', false, true);
                         $table->integer('role_id', false, true);
 
@@ -392,7 +392,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'rule_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -415,7 +415,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'rules',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -443,7 +443,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'rule_actions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('rule_id', false, true);
@@ -468,7 +468,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'rule_triggers',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('rule_id', false, true);
@@ -497,7 +497,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'tags',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -528,7 +528,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'transaction_journals',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -561,7 +561,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'journal_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('transaction_journal_id', false, true);
@@ -581,7 +581,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'tag_transaction_journal',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('tag_id', false, true);
                         $table->integer('transaction_journal_id', false, true);
@@ -602,7 +602,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'budget_transaction_journal',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('budget_id', false, true);
                         $table->integer('transaction_journal_id', false, true);
@@ -620,7 +620,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'category_transaction_journal',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('category_id', false, true);
                         $table->integer('transaction_journal_id', false, true);
@@ -638,7 +638,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'piggy_bank_events',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('piggy_bank_id', false, true);
@@ -660,7 +660,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -683,7 +683,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'budget_transaction',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('budget_id', false, true);
                         $table->integer('transaction_id', false, true);
@@ -702,7 +702,7 @@ class CreateMainTables extends Migration
             try {
                 Schema::create(
                     'category_transaction',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('category_id', false, true);
                         $table->integer('transaction_id', false, true);
diff --git a/database/migrations/2016_09_12_121359_fix_nullables.php b/database/migrations/2016_09_12_121359_fix_nullables.php
index 90277e8c08..3f8d858915 100644
--- a/database/migrations/2016_09_12_121359_fix_nullables.php
+++ b/database/migrations/2016_09_12_121359_fix_nullables.php
@@ -51,7 +51,7 @@ class FixNullables extends Migration
             try {
                 Schema::table(
                     'rule_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->text('description')->nullable()->change();
                     }
                 );
@@ -65,7 +65,7 @@ class FixNullables extends Migration
             try {
                 Schema::table(
                     'rules',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->text('description')->nullable()->change();
                     }
                 );
diff --git a/database/migrations/2016_10_09_150037_expand_transactions_table.php b/database/migrations/2016_10_09_150037_expand_transactions_table.php
index fa5dc6bb8f..29a356f96d 100644
--- a/database/migrations/2016_10_09_150037_expand_transactions_table.php
+++ b/database/migrations/2016_10_09_150037_expand_transactions_table.php
@@ -42,7 +42,7 @@ class ExpandTransactionsTable extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('identifier');
                     }
                 );
@@ -64,7 +64,7 @@ class ExpandTransactionsTable extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->smallInteger('identifier', false, true)->default(0);
                     }
                 );
diff --git a/database/migrations/2016_10_22_075804_changes_for_v410.php b/database/migrations/2016_10_22_075804_changes_for_v410.php
index cb722eae7f..417bc70afe 100644
--- a/database/migrations/2016_10_22_075804_changes_for_v410.php
+++ b/database/migrations/2016_10_22_075804_changes_for_v410.php
@@ -51,7 +51,7 @@ class ChangesForV410 extends Migration
             try {
                 Schema::create(
                     'notes',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2016_11_24_210552_changes_for_v420.php b/database/migrations/2016_11_24_210552_changes_for_v420.php
index f66cce7988..54a8c898c3 100644
--- a/database/migrations/2016_11_24_210552_changes_for_v420.php
+++ b/database/migrations/2016_11_24_210552_changes_for_v420.php
@@ -41,7 +41,7 @@ class ChangesForV420 extends Migration
             try {
                 Schema::table(
                     'journal_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropSoftDeletes();
                     }
                 );
@@ -63,7 +63,7 @@ class ChangesForV420 extends Migration
             try {
                 Schema::table(
                     'journal_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->softDeletes();
                     }
                 );
diff --git a/database/migrations/2016_12_22_150431_changes_for_v430.php b/database/migrations/2016_12_22_150431_changes_for_v430.php
index 39538f84b7..dce36a973d 100644
--- a/database/migrations/2016_12_22_150431_changes_for_v430.php
+++ b/database/migrations/2016_12_22_150431_changes_for_v430.php
@@ -51,7 +51,7 @@ class ChangesForV430 extends Migration
             try {
                 Schema::create(
                     'available_budgets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2016_12_28_203205_changes_for_v431.php b/database/migrations/2016_12_28_203205_changes_for_v431.php
index e33c166654..8c20187715 100644
--- a/database/migrations/2016_12_28_203205_changes_for_v431.php
+++ b/database/migrations/2016_12_28_203205_changes_for_v431.php
@@ -43,7 +43,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('repeat_freq', 30)->nullable();
                     }
                 );
@@ -56,7 +56,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->boolean('repeats')->default(0);
                     }
                 );
@@ -70,7 +70,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->renameColumn('start_date', 'startdate');
                     }
                 );
@@ -85,7 +85,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('end_date');
                     }
                 );
@@ -99,7 +99,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'transaction_currencies',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('decimal_places');
                     }
                 );
@@ -122,7 +122,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'transaction_currencies',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->smallInteger('decimal_places', false, true)->default(2);
                     }
                 );
@@ -137,7 +137,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->renameColumn('startdate', 'start_date');
                     }
                 );
@@ -152,7 +152,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->date('end_date')->nullable()->after('start_date');
                     }
                 );
@@ -167,7 +167,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('repeats');
                     }
                 );
@@ -180,7 +180,7 @@ class ChangesForV431 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('repeat_freq');
                     }
                 );
diff --git a/database/migrations/2017_04_13_163623_changes_for_v440.php b/database/migrations/2017_04_13_163623_changes_for_v440.php
index 39970e7b17..075c03181c 100644
--- a/database/migrations/2017_04_13_163623_changes_for_v440.php
+++ b/database/migrations/2017_04_13_163623_changes_for_v440.php
@@ -43,7 +43,7 @@ class ChangesForV440 extends Migration
         try {
             Schema::table(
                 'transactions',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if (Schema::hasColumn('transactions', 'transaction_currency_id')) {
                         // cannot drop foreign keys in SQLite:
                         if ('sqlite' !== config('database.default')) {
@@ -70,7 +70,7 @@ class ChangesForV440 extends Migration
             try {
                 Schema::create(
                     'currency_exchange_rates',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -95,7 +95,7 @@ class ChangesForV440 extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if (!Schema::hasColumn('transactions', 'transaction_currency_id')) {
                             $table->integer('transaction_currency_id', false, true)->after('description')->nullable();
                             $table->foreign('transaction_currency_id')->references('id')->on('transaction_currencies')->onDelete('set null');
diff --git a/database/migrations/2017_06_02_105232_changes_for_v450.php b/database/migrations/2017_06_02_105232_changes_for_v450.php
index 8fbb89c9a1..b1e5267036 100644
--- a/database/migrations/2017_06_02_105232_changes_for_v450.php
+++ b/database/migrations/2017_06_02_105232_changes_for_v450.php
@@ -43,7 +43,7 @@ class ChangesForV450 extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('foreign_amount');
                     }
                 );
@@ -56,7 +56,7 @@ class ChangesForV450 extends Migration
         try {
             Schema::table(
                 'transactions',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     // cannot drop foreign keys in SQLite:
                     if ('sqlite' !== config('database.default')) {
                         $table->dropForeign('transactions_foreign_currency_id_foreign');
@@ -71,7 +71,7 @@ class ChangesForV450 extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('foreign_currency_id');
                     }
                 );
@@ -94,7 +94,7 @@ class ChangesForV450 extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->decimal('foreign_amount', 32, 12)->nullable()->after('amount');
                     }
                 );
@@ -109,7 +109,7 @@ class ChangesForV450 extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('foreign_currency_id', false, true)->default(null)->after('foreign_amount')->nullable();
                         $table->foreign('foreign_currency_id')->references('id')->on('transaction_currencies')->onDelete('set null');
                     }
diff --git a/database/migrations/2017_08_20_062014_changes_for_v470.php b/database/migrations/2017_08_20_062014_changes_for_v470.php
index 3ac4a9d78f..0c3794cda4 100644
--- a/database/migrations/2017_08_20_062014_changes_for_v470.php
+++ b/database/migrations/2017_08_20_062014_changes_for_v470.php
@@ -53,7 +53,7 @@ class ChangesForV470 extends Migration
             try {
                 Schema::create(
                     'link_types',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -75,7 +75,7 @@ class ChangesForV470 extends Migration
             try {
                 Schema::create(
                     'journal_links',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->integer('link_type_id', false, true);
diff --git a/database/migrations/2017_11_04_170844_changes_for_v470a.php b/database/migrations/2017_11_04_170844_changes_for_v470a.php
index b174b72aad..01e7460537 100644
--- a/database/migrations/2017_11_04_170844_changes_for_v470a.php
+++ b/database/migrations/2017_11_04_170844_changes_for_v470a.php
@@ -43,7 +43,7 @@ class ChangesForV470a extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('reconciled');
                     }
                 );
@@ -65,7 +65,7 @@ class ChangesForV470a extends Migration
             try {
                 Schema::table(
                     'transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->boolean('reconciled')->after('deleted_at')->default(0);
                     }
                 );
diff --git a/database/migrations/2018_01_01_000001_create_oauth_auth_codes_table.php b/database/migrations/2018_01_01_000001_create_oauth_auth_codes_table.php
index 1f77365235..cb70131bf2 100644
--- a/database/migrations/2018_01_01_000001_create_oauth_auth_codes_table.php
+++ b/database/migrations/2018_01_01_000001_create_oauth_auth_codes_table.php
@@ -53,7 +53,7 @@ class CreateOauthAuthCodesTable extends Migration
             try {
                 Schema::create(
                     'oauth_auth_codes',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('id', 100)->primary();
                         $table->integer('user_id');
                         $table->integer('client_id');
diff --git a/database/migrations/2018_01_01_000002_create_oauth_access_tokens_table.php b/database/migrations/2018_01_01_000002_create_oauth_access_tokens_table.php
index 846d6cded8..cc41b105bd 100644
--- a/database/migrations/2018_01_01_000002_create_oauth_access_tokens_table.php
+++ b/database/migrations/2018_01_01_000002_create_oauth_access_tokens_table.php
@@ -53,7 +53,7 @@ class CreateOauthAccessTokensTable extends Migration
             try {
                 Schema::create(
                     'oauth_access_tokens',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('id', 100)->primary();
                         $table->integer('user_id')->index()->nullable();
                         $table->integer('client_id');
diff --git a/database/migrations/2018_01_01_000003_create_oauth_refresh_tokens_table.php b/database/migrations/2018_01_01_000003_create_oauth_refresh_tokens_table.php
index 26a44fdd0e..3b91d74abc 100644
--- a/database/migrations/2018_01_01_000003_create_oauth_refresh_tokens_table.php
+++ b/database/migrations/2018_01_01_000003_create_oauth_refresh_tokens_table.php
@@ -53,7 +53,7 @@ class CreateOauthRefreshTokensTable extends Migration
             try {
                 Schema::create(
                     'oauth_refresh_tokens',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('id', 100)->primary();
                         $table->string('access_token_id', 100)->index();
                         $table->boolean('revoked');
diff --git a/database/migrations/2018_01_01_000004_create_oauth_clients_table.php b/database/migrations/2018_01_01_000004_create_oauth_clients_table.php
index ca86388fd2..7c75715cb0 100644
--- a/database/migrations/2018_01_01_000004_create_oauth_clients_table.php
+++ b/database/migrations/2018_01_01_000004_create_oauth_clients_table.php
@@ -53,7 +53,7 @@ class CreateOauthClientsTable extends Migration
             try {
                 Schema::create(
                     'oauth_clients',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('user_id')->index()->nullable();
                         $table->string('name');
diff --git a/database/migrations/2018_01_01_000005_create_oauth_personal_access_clients_table.php b/database/migrations/2018_01_01_000005_create_oauth_personal_access_clients_table.php
index 1c6c711835..2bdfa66075 100644
--- a/database/migrations/2018_01_01_000005_create_oauth_personal_access_clients_table.php
+++ b/database/migrations/2018_01_01_000005_create_oauth_personal_access_clients_table.php
@@ -53,7 +53,7 @@ class CreateOauthPersonalAccessClientsTable extends Migration
             try {
                 Schema::create(
                     'oauth_personal_access_clients',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('client_id')->index();
                         $table->timestamps();
diff --git a/database/migrations/2018_03_19_141348_changes_for_v472.php b/database/migrations/2018_03_19_141348_changes_for_v472.php
index e0fc018f3b..b6919563bc 100644
--- a/database/migrations/2018_03_19_141348_changes_for_v472.php
+++ b/database/migrations/2018_03_19_141348_changes_for_v472.php
@@ -43,7 +43,7 @@ class ChangesForV472 extends Migration
             try {
                 Schema::table(
                     'attachments',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->text('notes')->nullable();
                     }
                 );
@@ -57,7 +57,7 @@ class ChangesForV472 extends Migration
             try {
                 Schema::table(
                     'budgets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('order');
                     }
                 );
@@ -79,7 +79,7 @@ class ChangesForV472 extends Migration
             try {
                 Schema::table(
                     'attachments',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('notes');
                     }
                 );
@@ -93,7 +93,7 @@ class ChangesForV472 extends Migration
             try {
                 Schema::table(
                     'budgets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->mediumInteger('order', false, true)->default(0);
                     }
                 );
diff --git a/database/migrations/2018_04_07_210913_changes_for_v473.php b/database/migrations/2018_04_07_210913_changes_for_v473.php
index 80add3a888..b9ba91e78c 100644
--- a/database/migrations/2018_04_07_210913_changes_for_v473.php
+++ b/database/migrations/2018_04_07_210913_changes_for_v473.php
@@ -44,7 +44,7 @@ class ChangesForV473 extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // cannot drop foreign keys in SQLite:
                         if ('sqlite' !== config('database.default')) {
                             $table->dropForeign('bills_transaction_currency_id_foreign');
@@ -62,7 +62,7 @@ class ChangesForV473 extends Migration
             try {
                 Schema::table(
                     'rules',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('strict');
                     }
                 );
@@ -84,7 +84,7 @@ class ChangesForV473 extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('transaction_currency_id', false, true)->nullable()->after('user_id');
                         $table->foreign('transaction_currency_id')->references('id')->on('transaction_currencies')->onDelete('set null');
                     }
@@ -98,7 +98,7 @@ class ChangesForV473 extends Migration
             try {
                 Schema::table(
                     'rules',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->boolean('strict')->default(true);
                     }
                 );
diff --git a/database/migrations/2018_06_08_200526_changes_for_v475.php b/database/migrations/2018_06_08_200526_changes_for_v475.php
index 85384c9376..6575103788 100644
--- a/database/migrations/2018_06_08_200526_changes_for_v475.php
+++ b/database/migrations/2018_06_08_200526_changes_for_v475.php
@@ -56,7 +56,7 @@ class ChangesForV475 extends Migration
             try {
                 Schema::create(
                     'recurrences',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -87,7 +87,7 @@ class ChangesForV475 extends Migration
             try {
                 Schema::create(
                     'recurrences_transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -118,7 +118,7 @@ class ChangesForV475 extends Migration
             try {
                 Schema::create(
                     'recurrences_repetitions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -141,7 +141,7 @@ class ChangesForV475 extends Migration
             try {
                 Schema::create(
                     'recurrences_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -163,7 +163,7 @@ class ChangesForV475 extends Migration
             try {
                 Schema::create(
                     'rt_meta',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2018_09_05_195147_changes_for_v477.php b/database/migrations/2018_09_05_195147_changes_for_v477.php
index 04da77b3da..b4c1e8c9fb 100644
--- a/database/migrations/2018_09_05_195147_changes_for_v477.php
+++ b/database/migrations/2018_09_05_195147_changes_for_v477.php
@@ -43,7 +43,7 @@ class ChangesForV477 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // cannot drop foreign keys in SQLite:
                         if ('sqlite' !== config('database.default')) {
                             $table->dropForeign('budget_limits_transaction_currency_id_foreign');
@@ -70,7 +70,7 @@ class ChangesForV477 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('transaction_currency_id', false, true)->nullable()->after('budget_id');
                         $table->foreign('transaction_currency_id')->references('id')->on('transaction_currencies')->onDelete('set null');
                     }
diff --git a/database/migrations/2018_11_06_172532_changes_for_v479.php b/database/migrations/2018_11_06_172532_changes_for_v479.php
index 2e7c4bf568..f391bc5431 100644
--- a/database/migrations/2018_11_06_172532_changes_for_v479.php
+++ b/database/migrations/2018_11_06_172532_changes_for_v479.php
@@ -43,7 +43,7 @@ class ChangesForV479 extends Migration
             try {
                 Schema::table(
                     'transaction_currencies',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn(['enabled']);
                     }
                 );
@@ -65,7 +65,7 @@ class ChangesForV479 extends Migration
             try {
                 Schema::table(
                     'transaction_currencies',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->boolean('enabled')->default(0)->after('deleted_at');
                     }
                 );
diff --git a/database/migrations/2019_01_28_193833_changes_for_v4710.php b/database/migrations/2019_01_28_193833_changes_for_v4710.php
index f9c8e46ae9..26d1423964 100644
--- a/database/migrations/2019_01_28_193833_changes_for_v4710.php
+++ b/database/migrations/2019_01_28_193833_changes_for_v4710.php
@@ -54,7 +54,7 @@ class ChangesForV4710 extends Migration
             try {
                 Schema::create(
                     'transaction_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -74,7 +74,7 @@ class ChangesForV4710 extends Migration
             try {
                 Schema::create(
                     'group_journals',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('transaction_group_id', false, true);
                         $table->integer('transaction_journal_id', false, true);
diff --git a/database/migrations/2019_02_05_055516_changes_for_v4711.php b/database/migrations/2019_02_05_055516_changes_for_v4711.php
index d3329eb39b..b9b4d8a7de 100644
--- a/database/migrations/2019_02_05_055516_changes_for_v4711.php
+++ b/database/migrations/2019_02_05_055516_changes_for_v4711.php
@@ -57,7 +57,7 @@ class ChangesForV4711 extends Migration
         try {
             Schema::table(
                 'transaction_journals',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     $table->dateTime('date')->change();
                 }
             );
@@ -69,7 +69,7 @@ class ChangesForV4711 extends Migration
         try {
             Schema::table(
                 'preferences',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     $table->text('data')->nullable()->change();
                 }
             );
diff --git a/database/migrations/2019_02_11_170529_changes_for_v4712.php b/database/migrations/2019_02_11_170529_changes_for_v4712.php
index 1a796723ef..118d6c63c7 100644
--- a/database/migrations/2019_02_11_170529_changes_for_v4712.php
+++ b/database/migrations/2019_02_11_170529_changes_for_v4712.php
@@ -56,7 +56,7 @@ class ChangesForV4712 extends Migration
         try {
             Schema::table(
                 'transaction_journals',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     $table->dateTime('date')->change();
                 }
             );
diff --git a/database/migrations/2019_03_11_223700_fix_ldap_configuration.php b/database/migrations/2019_03_11_223700_fix_ldap_configuration.php
index b51861d508..c31cb12910 100644
--- a/database/migrations/2019_03_11_223700_fix_ldap_configuration.php
+++ b/database/migrations/2019_03_11_223700_fix_ldap_configuration.php
@@ -43,7 +43,7 @@ class FixLdapConfiguration extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn(['objectguid']);
                     }
                 );
@@ -69,7 +69,7 @@ class FixLdapConfiguration extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->uuid('objectguid')->nullable()->after('id');
                     }
                 );
diff --git a/database/migrations/2019_03_22_183214_changes_for_v480.php b/database/migrations/2019_03_22_183214_changes_for_v480.php
index 142e77cf94..bdd332e7d4 100644
--- a/database/migrations/2019_03_22_183214_changes_for_v480.php
+++ b/database/migrations/2019_03_22_183214_changes_for_v480.php
@@ -43,7 +43,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'transaction_journals',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // drop transaction_group_id + foreign key.
                         // cannot drop foreign keys in SQLite:
                         if ('sqlite' !== config('database.default')) {
@@ -74,7 +74,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'rule_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         try {
                             $table->dropColumn('stop_processing');
                         } catch (ColumnDoesNotExist|QueryException $e) {
@@ -94,7 +94,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         try {
                             $table->dropColumn('mfa_secret');
                         } catch (ColumnDoesNotExist|QueryException $e) {
@@ -122,7 +122,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'transaction_journals',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('transaction_currency_id', false, true)->nullable()->change();
 
                         // add column "group_id" after "transaction_type_id"
@@ -152,7 +152,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'rule_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->boolean('stop_processing')->default(false);
                     }
                 );
@@ -167,7 +167,7 @@ class ChangesForV480 extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('mfa_secret', 50)->nullable();
                     }
                 );
diff --git a/database/migrations/2019_12_28_191351_make_locations_table.php b/database/migrations/2019_12_28_191351_make_locations_table.php
index 72ea6cc018..b9125a2de6 100644
--- a/database/migrations/2019_12_28_191351_make_locations_table.php
+++ b/database/migrations/2019_12_28_191351_make_locations_table.php
@@ -53,7 +53,7 @@ class MakeLocationsTable extends Migration
             try {
                 Schema::create(
                     'locations',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2020_03_13_201950_changes_for_v520.php b/database/migrations/2020_03_13_201950_changes_for_v520.php
index 71ea92a1a0..7bbc6f1fba 100644
--- a/database/migrations/2020_03_13_201950_changes_for_v520.php
+++ b/database/migrations/2020_03_13_201950_changes_for_v520.php
@@ -52,7 +52,7 @@ class ChangesForV520 extends Migration
             try {
                 Schema::create(
                     'auto_budgets',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2020_06_07_063612_changes_for_v530.php b/database/migrations/2020_06_07_063612_changes_for_v530.php
index d07a4048bc..42c3d53903 100644
--- a/database/migrations/2020_06_07_063612_changes_for_v530.php
+++ b/database/migrations/2020_06_07_063612_changes_for_v530.php
@@ -53,7 +53,7 @@ class ChangesForV530 extends Migration
             try {
                 Schema::create(
                     'object_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->integer('user_id', false, true);
                         $table->timestamps();
@@ -73,7 +73,7 @@ class ChangesForV530 extends Migration
             try {
                 Schema::create(
                     'object_groupables',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('object_group_id');
                         $table->integer('object_groupable_id', false, true);
                         $table->string('object_groupable_type', 255);
diff --git a/database/migrations/2020_06_30_202620_changes_for_v530a.php b/database/migrations/2020_06_30_202620_changes_for_v530a.php
index 545c82cc8c..b9b6f0925f 100644
--- a/database/migrations/2020_06_30_202620_changes_for_v530a.php
+++ b/database/migrations/2020_06_30_202620_changes_for_v530a.php
@@ -44,7 +44,7 @@ class ChangesForV530a extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('order');
                     }
                 );
@@ -66,7 +66,7 @@ class ChangesForV530a extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('order', false, true)->default(0);
                     }
                 );
diff --git a/database/migrations/2020_07_24_162820_changes_for_v540.php b/database/migrations/2020_07_24_162820_changes_for_v540.php
index f71a4c8f7f..7fe7afd7a5 100644
--- a/database/migrations/2020_07_24_162820_changes_for_v540.php
+++ b/database/migrations/2020_07_24_162820_changes_for_v540.php
@@ -44,7 +44,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'oauth_clients',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('provider');
                     }
                 );
@@ -58,7 +58,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'accounts',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('order');
                     }
                 );
@@ -72,7 +72,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('end_date');
                     }
                 );
@@ -85,7 +85,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('extension_date');
                     }
                 );
@@ -107,7 +107,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'accounts',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->integer('order', false, true)->default(0);
                     }
                 );
@@ -121,7 +121,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'oauth_clients',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('provider')->nullable();
                     }
                 );
@@ -135,7 +135,7 @@ class ChangesForV540 extends Migration
             try {
                 Schema::table(
                     'bills',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->date('end_date')->nullable()->after('date');
                         $table->date('extension_date')->nullable()->after('end_date');
                     }
@@ -150,7 +150,7 @@ class ChangesForV540 extends Migration
         try {
             Schema::table(
                 'oauth_clients',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     $table->string('secret', 100)->nullable()->change();
                 }
             );
diff --git a/database/migrations/2020_11_12_070604_changes_for_v550.php b/database/migrations/2020_11_12_070604_changes_for_v550.php
index 7440735421..8364c8224b 100644
--- a/database/migrations/2020_11_12_070604_changes_for_v550.php
+++ b/database/migrations/2020_11_12_070604_changes_for_v550.php
@@ -45,7 +45,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'jobs',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         // straight from Laravel (this is the OLD table)
                         $table->bigIncrements('id');
                         $table->string('queue');
@@ -69,7 +69,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::table(
                     'budget_transaction_journal',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if ('sqlite' !== config('database.default')) {
                             $table->dropForeign('budget_id_foreign');
                         }
@@ -91,7 +91,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('period');
                     }
                 );
@@ -104,7 +104,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::table(
                     'budget_limits',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn('generated');
                     }
                 );
@@ -134,7 +134,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'jobs',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->string('queue')->index();
                         $table->longText('payload');
@@ -157,7 +157,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'failed_jobs',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->string('uuid')->unique();
                         $table->text('connection');
@@ -178,7 +178,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::table(
                     'budget_transaction_journal',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if (!Schema::hasColumn('budget_transaction_journal', 'budget_limit_id')) {
                             $table->integer('budget_limit_id', false, true)->nullable()->default(null)->after('budget_id');
                             $table->foreign('budget_limit_id', 'budget_id_foreign')->references('id')->on('budget_limits')->onDelete('set null');
@@ -197,7 +197,7 @@ class ChangesForV550 extends Migration
         try {
             Schema::table(
                 'budget_limits',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if (!Schema::hasColumn('budget_limits', 'period')) {
                         $table->string('period', 12)->nullable();
                     }
@@ -216,7 +216,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'webhooks',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -243,7 +243,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'webhook_messages',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -267,7 +267,7 @@ class ChangesForV550 extends Migration
             try {
                 Schema::create(
                     'webhook_attempts',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->increments('id');
                         $table->timestamps();
                         $table->softDeletes();
diff --git a/database/migrations/2021_03_12_061213_changes_for_v550b2.php b/database/migrations/2021_03_12_061213_changes_for_v550b2.php
index a9736d6613..5e1f30eda4 100644
--- a/database/migrations/2021_03_12_061213_changes_for_v550b2.php
+++ b/database/migrations/2021_03_12_061213_changes_for_v550b2.php
@@ -42,7 +42,7 @@ class ChangesForV550b2 extends Migration
             try {
                 Schema::table(
                     'recurrences_transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if ('sqlite' !== config('database.default')) {
                             $table->dropForeign('type_foreign');
                         }
@@ -70,7 +70,7 @@ class ChangesForV550b2 extends Migration
             try {
                 Schema::table(
                     'recurrences_transactions',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if (!Schema::hasColumn('recurrences_transactions', 'transaction_type_id')) {
                             $table->integer('transaction_type_id', false, true)->nullable()->after('transaction_currency_id');
                             $table->foreign('transaction_type_id', 'type_foreign')->references('id')->on('transaction_types')->onDelete('set null');
diff --git a/database/migrations/2021_05_09_064644_add_ldap_columns_to_users_table.php b/database/migrations/2021_05_09_064644_add_ldap_columns_to_users_table.php
index 624b332e77..8d96ab23f4 100644
--- a/database/migrations/2021_05_09_064644_add_ldap_columns_to_users_table.php
+++ b/database/migrations/2021_05_09_064644_add_ldap_columns_to_users_table.php
@@ -39,7 +39,7 @@ class AddLdapColumnsToUsersTable extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->dropColumn(['domain']);
                     }
                 );
@@ -61,7 +61,7 @@ class AddLdapColumnsToUsersTable extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->string('domain')->nullable();
                     }
                 );
diff --git a/database/migrations/2021_05_13_053836_extend_currency_info.php b/database/migrations/2021_05_13_053836_extend_currency_info.php
index 081e931c5a..888bbab2fa 100644
--- a/database/migrations/2021_05_13_053836_extend_currency_info.php
+++ b/database/migrations/2021_05_13_053836_extend_currency_info.php
@@ -47,7 +47,7 @@ class ExtendCurrencyInfo extends Migration
         try {
             Schema::table(
                 'transaction_currencies',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     $table->string('code', 51)->change();
                     $table->string('symbol', 51)->change();
                 }
diff --git a/database/migrations/2021_08_28_073733_user_groups.php b/database/migrations/2021_08_28_073733_user_groups.php
index 0e48c875fc..9a9a37e249 100644
--- a/database/migrations/2021_08_28_073733_user_groups.php
+++ b/database/migrations/2021_08_28_073733_user_groups.php
@@ -63,7 +63,7 @@ class UserGroups extends Migration
                 try {
                     Schema::table(
                         $tableName,
-                        static function (Blueprint $table) use ($tableName) {
+                        static function (Blueprint $table) use ($tableName): void {
                             if ('sqlite' !== config('database.default')) {
                                 $table->dropForeign(sprintf('%s_to_ugi', $tableName));
                             }
@@ -83,7 +83,7 @@ class UserGroups extends Migration
             try {
                 Schema::table(
                     'users',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         if ('sqlite' !== config('database.default')) {
                             $table->dropForeign('type_user_group_id');
                         }
@@ -118,7 +118,7 @@ class UserGroups extends Migration
             try {
                 Schema::create(
                     'user_groups',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -136,7 +136,7 @@ class UserGroups extends Migration
             try {
                 Schema::create(
                     'user_roles',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -154,7 +154,7 @@ class UserGroups extends Migration
             try {
                 Schema::create(
                     'group_memberships',
-                    static function (Blueprint $table) {
+                    static function (Blueprint $table): void {
                         $table->bigIncrements('id');
                         $table->timestamps();
                         $table->softDeletes();
@@ -177,7 +177,7 @@ class UserGroups extends Migration
         try {
             Schema::table(
                 'users',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if (!Schema::hasColumn('users', 'user_group_id')) {
                         $table->bigInteger('user_group_id', false, true)->nullable();
                         $table->foreign('user_group_id', 'type_user_group_id')->references('id')->on('user_groups')->onDelete('set null')->onUpdate(
@@ -197,7 +197,7 @@ class UserGroups extends Migration
             try {
                 Schema::table(
                     $tableName,
-                    static function (Blueprint $table) use ($tableName) {
+                    static function (Blueprint $table) use ($tableName): void {
                         if (!Schema::hasColumn($tableName, 'user_group_id')) {
                             $table->bigInteger('user_group_id', false, true)->nullable()->after('user_id');
                             $table->foreign('user_group_id', sprintf('%s_to_ugi', $tableName))->references('id')->on('user_groups')->onDelete(
diff --git a/database/migrations/2021_12_27_000001_create_local_personal_access_tokens_table.php b/database/migrations/2021_12_27_000001_create_local_personal_access_tokens_table.php
index b341a65e5c..c551a9fe43 100644
--- a/database/migrations/2021_12_27_000001_create_local_personal_access_tokens_table.php
+++ b/database/migrations/2021_12_27_000001_create_local_personal_access_tokens_table.php
@@ -49,7 +49,7 @@ class CreateLocalPersonalAccessTokensTable extends Migration
     {
         if (!Schema::hasTable('personal_access_tokens')) {
             try {
-                Schema::create('personal_access_tokens', static function (Blueprint $table) {
+                Schema::create('personal_access_tokens', static function (Blueprint $table): void {
                     $table->bigIncrements('id');
                     $table->morphs('tokenable');
                     $table->string('name');
diff --git a/database/migrations/2022_08_21_104626_add_user_groups.php b/database/migrations/2022_08_21_104626_add_user_groups.php
index 3b348e0fd7..552c66bcc1 100644
--- a/database/migrations/2022_08_21_104626_add_user_groups.php
+++ b/database/migrations/2022_08_21_104626_add_user_groups.php
@@ -39,7 +39,7 @@ return new class() extends Migration {
         try {
             Schema::table(
                 'currency_exchange_rates',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if (!Schema::hasColumn('currency_exchange_rates', 'user_group_id')) {
                         $table->bigInteger('user_group_id', false, true)->nullable()->after('user_id');
                         $table->foreign('user_group_id', 'cer_to_ugi')->references('id')->on('user_groups')->onDelete('set null')->onUpdate('cascade');
@@ -60,7 +60,7 @@ return new class() extends Migration {
         try {
             Schema::table(
                 'currency_exchange_rates',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if ('sqlite' !== config('database.default')) {
                         $table->dropForeign('cer_to_ugi');
                     }
diff --git a/database/migrations/2022_09_18_123911_create_notifications_table.php b/database/migrations/2022_09_18_123911_create_notifications_table.php
index 862bbb94fd..034f4625fe 100644
--- a/database/migrations/2022_09_18_123911_create_notifications_table.php
+++ b/database/migrations/2022_09_18_123911_create_notifications_table.php
@@ -37,7 +37,7 @@ return new class() extends Migration {
     {
         if (!Schema::hasTable('notifications')) {
             try {
-                Schema::create('notifications', static function (Blueprint $table) {
+                Schema::create('notifications', static function (Blueprint $table): void {
                     $table->uuid('id')->primary();
                     $table->string('type');
                     $table->morphs('notifiable');
diff --git a/database/migrations/2022_10_01_074908_invited_users.php b/database/migrations/2022_10_01_074908_invited_users.php
index 84c40cddca..f802f72179 100644
--- a/database/migrations/2022_10_01_074908_invited_users.php
+++ b/database/migrations/2022_10_01_074908_invited_users.php
@@ -37,7 +37,7 @@ return new class() extends Migration {
     {
         if (!Schema::hasTable('invited_users')) {
             try {
-                Schema::create('invited_users', static function (Blueprint $table) {
+                Schema::create('invited_users', static function (Blueprint $table): void {
                     $table->id();
                     $table->timestamps();
                     $table->integer('user_id', false, true);
diff --git a/database/migrations/2022_10_01_210238_audit_log_entries.php b/database/migrations/2022_10_01_210238_audit_log_entries.php
index 57ff51c5a5..bf6cf14f60 100644
--- a/database/migrations/2022_10_01_210238_audit_log_entries.php
+++ b/database/migrations/2022_10_01_210238_audit_log_entries.php
@@ -37,7 +37,7 @@ return new class() extends Migration {
     {
         if (!Schema::hasTable('audit_log_entries')) {
             try {
-                Schema::create('audit_log_entries', static function (Blueprint $table) {
+                Schema::create('audit_log_entries', static function (Blueprint $table): void {
                     $table->id();
                     $table->timestamps();
                     $table->softDeletes();
diff --git a/database/migrations/2023_08_11_192521_upgrade_og_table.php b/database/migrations/2023_08_11_192521_upgrade_og_table.php
index f5e37d2a6a..aea11c646f 100644
--- a/database/migrations/2023_08_11_192521_upgrade_og_table.php
+++ b/database/migrations/2023_08_11_192521_upgrade_og_table.php
@@ -39,7 +39,7 @@ return new class() extends Migration {
         try {
             Schema::table(
                 'object_groups',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if (!Schema::hasColumn('object_groups', 'user_group_id')) {
                         $table->bigInteger('user_group_id', false, true)->nullable()->after('user_id');
                         $table->foreign('user_group_id', sprintf('%s_to_ugi', 'object_groups'))->references('id')->on('user_groups')->onDelete(
@@ -62,7 +62,7 @@ return new class() extends Migration {
         try {
             Schema::table(
                 'object_groups',
-                static function (Blueprint $table) {
+                static function (Blueprint $table): void {
                     if ('sqlite' !== config('database.default')) {
                         $table->dropForeign(sprintf('%s_to_ugi', 'object_groups'));
                     }
diff --git a/database/migrations/2023_10_21_113213_add_currency_pivot_tables.php b/database/migrations/2023_10_21_113213_add_currency_pivot_tables.php
index d32ece5411..ee53d2c3e5 100644
--- a/database/migrations/2023_10_21_113213_add_currency_pivot_tables.php
+++ b/database/migrations/2023_10_21_113213_add_currency_pivot_tables.php
@@ -37,7 +37,7 @@ return new class() extends Migration {
         // transaction_currency_user
         if (!Schema::hasTable('transaction_currency_user')) {
             try {
-                Schema::create('transaction_currency_user', static function (Blueprint $table) {
+                Schema::create('transaction_currency_user', static function (Blueprint $table): void {
                     $table->id();
                     $table->timestamps();
                     $table->integer('user_id', false, true);
@@ -56,7 +56,7 @@ return new class() extends Migration {
         // transaction_currency_user_group
         if (!Schema::hasTable('transaction_currency_user_group')) {
             try {
-                Schema::create('transaction_currency_user_group', static function (Blueprint $table) {
+                Schema::create('transaction_currency_user_group', static function (Blueprint $table): void {
                     $table->id();
                     $table->timestamps();
                     $table->bigInteger('user_group_id', false, true);
diff --git a/database/seeders/UserRoleSeeder.php b/database/seeders/UserRoleSeeder.php
index ee9a680bdb..76d1c2084f 100644
--- a/database/seeders/UserRoleSeeder.php
+++ b/database/seeders/UserRoleSeeder.php
@@ -36,7 +36,7 @@ class UserRoleSeeder extends Seeder
     /**
      * Run the database seeds.
      */
-    public function run()
+    public function run(): void
     {
         $roles = [];
         foreach (UserRoleEnum::cases() as $role) {
diff --git a/routes/api-noauth.php b/routes/api-noauth.php
index cd7f16f571..b062cf43cc 100644
--- a/routes/api-noauth.php
+++ b/routes/api-noauth.php
@@ -28,7 +28,7 @@ Route::group(
         'prefix'    => '',
         'as'        => 'api.v1.cron.',
     ],
-    static function () {
+    static function (): void {
         Route::get('{cliToken}', ['uses' => 'CronController@cron', 'as' => 'index']);
     }
 );
diff --git a/routes/api.php b/routes/api.php
index 213c90d828..32ffe97a1f 100644
--- a/routes/api.php
+++ b/routes/api.php
@@ -30,7 +30,7 @@ Route::group(
         'prefix'    => 'v2/summary',
         'as'        => 'api.v2.summary.',
     ],
-    static function () {
+    static function (): void {
         Route::get('basic', ['uses' => 'BasicController@basic', 'as' => 'basic']);
     }
 );
@@ -41,7 +41,7 @@ Route::group(
         'prefix'    => 'v2',
         'as'        => 'api.v2.',
     ],
-    static function () {
+    static function (): void {
         Route::get('transactions', ['uses' => 'TransactionController@list', 'as' => 'transactions.list']);
         Route::get('accounts/{userGroupAccount}/transactions', ['uses' => 'AccountController@list', 'as' => 'accounts.transactions']);
     }
@@ -54,7 +54,7 @@ Route::group(
         'prefix'    => 'v2/autocomplete',
         'as'        => 'api.v2.autocomplete.',
     ],
-    static function () {
+    static function (): void {
         // Auto complete routes
         Route::get('accounts', ['uses' => 'AccountController@accounts', 'as' => 'accounts']);
         Route::get('transaction-descriptions', ['uses' => 'TransactionController@transactionDescriptions', 'as' => 'transaction-descriptions']);
@@ -68,7 +68,7 @@ Route::group(
         'prefix'    => 'v2/net-worth',
         'as'        => 'api.v2.net-worth.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'NetWorthController@get', 'as' => 'index']);
     }
 );
@@ -80,7 +80,7 @@ Route::group(
         'prefix'    => 'v2/chart',
         'as'        => 'api.v1.chart.',
     ],
-    static function () {
+    static function (): void {
         Route::get('account/dashboard', ['uses' => 'AccountController@dashboard', 'as' => 'account.dashboard']);
         Route::get('budget/dashboard', ['uses' => 'BudgetController@dashboard', 'as' => 'budget.dashboard']);
         Route::get('category/dashboard', ['uses' => 'CategoryController@dashboard', 'as' => 'category.dashboard']);
@@ -95,7 +95,7 @@ Route::group(
         'prefix'    => 'v2/accounts',
         'as'        => 'api.v2.accounts.',
     ],
-    static function () {
+    static function (): void {
         Route::get('{account}', ['uses' => 'ShowController@show', 'as' => 'show']);
     }
 );
@@ -107,7 +107,7 @@ Route::group(
         'prefix'    => 'v2/subscriptions',
         'as'        => 'api.v2.subscriptions.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'IndexController@index', 'as' => 'index']);
         Route::get('{userGroupBill}', ['uses' => 'ShowController@show', 'as' => 'show']);
         Route::get('sum/paid', ['uses' => 'SumController@paid', 'as' => 'sum.paid']);
@@ -122,7 +122,7 @@ Route::group(
         'prefix'    => 'v2/piggy-banks',
         'as'        => 'api.v2.piggy-banks.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'IndexController@index', 'as' => 'index']);
     }
 );
@@ -134,7 +134,7 @@ Route::group(
         'prefix'    => 'v2/currencies',
         'as'        => 'api.v2.currencies.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'IndexController@index', 'as' => 'index']);
     }
 );
@@ -146,7 +146,7 @@ Route::group(
         'prefix'    => 'v2/transactions',
         'as'        => 'api.v2.transactions.',
     ],
-    static function () {
+    static function (): void {
         Route::post('', ['uses' => 'StoreController@post', 'as' => 'store']);
     }
 );
@@ -158,7 +158,7 @@ Route::group(
         'prefix'    => 'v2/budgets',
         'as'        => 'api.v2.budgets',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'Budget\IndexController@index', 'as' => 'index']);
         Route::get('{budget}', ['uses' => 'Budget\ShowController@show', 'as' => 'show']);
         Route::get('{budget}/limits', ['uses' => 'BudgetLimit\IndexController@index', 'as' => 'budget-limits.index']);
@@ -176,7 +176,7 @@ Route::group(
         'prefix'    => 'v2',
         'as'        => 'api.v2.system.',
     ],
-    static function () {
+    static function (): void {
         Route::get('preferences/{preference}', ['uses' => 'PreferencesController@get', 'as' => 'preferences.get']);
     }
 );
@@ -188,7 +188,7 @@ Route::group(
         'prefix'    => 'v2/user-groups',
         'as'        => 'api.v2.user-groups.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'IndexController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{userGroup}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -207,7 +207,7 @@ Route::group(
         'prefix'    => 'v1/autocomplete',
         'as'        => 'api.v1.autocomplete.',
     ],
-    static function () {
+    static function (): void {
         // Auto complete routes
         Route::get('accounts', ['uses' => 'AccountController@accounts', 'as' => 'accounts']);
         Route::get('bills', ['uses' => 'BillController@bills', 'as' => 'bills']);
@@ -236,7 +236,7 @@ Route::group(
         'prefix'    => 'v1/chart/account',
         'as'        => 'api.v1.chart.account.',
     ],
-    static function () {
+    static function (): void {
         Route::get('overview', ['uses' => 'AccountController@overview', 'as' => 'overview']);
     }
 );
@@ -249,7 +249,7 @@ Route::group(
         'prefix'    => 'v1/data/export',
         'as'        => 'api.v1.data.export.',
     ],
-    static function () {
+    static function (): void {
         Route::get('accounts', ['uses' => 'ExportController@accounts', 'as' => 'accounts']);
         Route::get('bills', ['uses' => 'ExportController@bills', 'as' => 'bills']);
         Route::get('budgets', ['uses' => 'ExportController@budgets', 'as' => 'budgets']);
@@ -268,7 +268,7 @@ Route::group(
         'prefix'    => 'v1/data/destroy',
         'as'        => 'api.v1.data.',
     ],
-    static function () {
+    static function (): void {
         Route::delete('', ['uses' => 'DestroyController@destroy', 'as' => 'destroy']);
     }
 );
@@ -278,7 +278,7 @@ Route::group(
         'prefix'    => 'v1/data/purge',
         'as'        => 'api.v1.data.',
     ],
-    static function () {
+    static function (): void {
         Route::delete('', ['uses' => 'PurgeController@purge', 'as' => 'purge']);
     }
 );
@@ -290,7 +290,7 @@ Route::group(
         'prefix'    => 'v1/data/bulk',
         'as'        => 'api.v1.data.bulk.',
     ],
-    static function () {
+    static function (): void {
         Route::post('transactions', ['uses' => 'TransactionController@update', 'as' => 'transactions']);
     }
 );
@@ -304,7 +304,7 @@ Route::group(
         'prefix'    => 'v1/insight/expense',
         'as'        => 'api.v1.insight.expense.',
     ],
-    static function () {
+    static function (): void {
         // Insight in expenses per account:
         Route::get('expense', ['uses' => 'AccountController@expense', 'as' => 'expense']);
         Route::get('asset', ['uses' => 'AccountController@asset', 'as' => 'asset']);
@@ -331,7 +331,7 @@ Route::group(
         'prefix'    => 'v1/insight/income',
         'as'        => 'api.v1.insight.income.',
     ],
-    static function () {
+    static function (): void {
         // Insight in expenses per account:
         Route::get('revenue', ['uses' => 'AccountController@revenue', 'as' => 'revenue']);
         Route::get('asset', ['uses' => 'AccountController@asset', 'as' => 'asset']);
@@ -356,7 +356,7 @@ Route::group(
         'prefix'    => 'v1/insight/transfer',
         'as'        => 'api.v1.insight.transfer.',
     ],
-    static function () {
+    static function (): void {
         // Insight in expenses per account:
         Route::get('asset', ['uses' => 'AccountController@asset', 'as' => 'asset']);
         Route::get('category', ['uses' => 'CategoryController@category', 'as' => 'category']);
@@ -375,7 +375,7 @@ Route::group(
         'prefix'    => 'v1/summary',
         'as'        => 'api.v1.summary.',
     ],
-    static function () {
+    static function (): void {
         Route::get('basic', ['uses' => 'BasicController@basic', 'as' => 'basic']);
     }
 );
@@ -388,7 +388,7 @@ Route::group(
         'prefix'    => 'v1/accounts',
         'as'        => 'api.v1.accounts.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{account}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -408,7 +408,7 @@ Route::group(
         'prefix'    => 'v1/attachments',
         'as'        => 'api.v1.attachments.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{attachment}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -426,7 +426,7 @@ Route::group(
         'prefix'    => 'v1/bills',
         'as'        => 'api.v1.bills.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{bill}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -446,7 +446,7 @@ Route::group(
         'prefix'    => 'v1/available-budgets',
         'as'        => 'api.v1.available-budgets.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         // Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{availableBudget}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -462,7 +462,7 @@ Route::group(
         'prefix'    => 'v1/budgets',
         'as'        => 'api.v1.budgets.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'Budget\ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'Budget\StoreController@store', 'as' => 'store']);
         Route::get('transactions-without-budget', ['uses' => 'Budget\ListController@withoutBudget', 'as' => 'without-budget']);
@@ -490,7 +490,7 @@ Route::group(
         'prefix'    => 'v1/budget-limits',
         'as'        => 'api.v1.budget-limits.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@indexAll', 'as' => 'index']);
     }
 );
@@ -502,7 +502,7 @@ Route::group(
         'prefix'    => 'v1/categories',
         'as'        => 'api.v1.categories.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{category}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -521,7 +521,7 @@ Route::group(
         'prefix'    => 'v1/object-groups',
         'as'        => 'api.v1.object-groups.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::get('{objectGroup}', ['uses' => 'ShowController@show', 'as' => 'show']);
         Route::put('{objectGroup}', ['uses' => 'UpdateController@update', 'as' => 'update']);
@@ -539,7 +539,7 @@ Route::group(
         'prefix'    => 'v1/piggy-banks',
         'as'        => 'api.v1.piggy-banks.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{piggyBank}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -558,7 +558,7 @@ Route::group(
         'prefix'    => 'v1/recurrences',
         'as'        => 'api.v1.recurrences.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{recurrence}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -577,7 +577,7 @@ Route::group(
         'prefix'    => 'v1/rules',
         'as'        => 'api.v1.rules.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{rule}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -598,7 +598,7 @@ Route::group(
         'prefix'    => 'v1/rule-groups',
         'as'        => 'api.v1.rule-groups.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{ruleGroup}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -618,7 +618,7 @@ Route::group(
         'prefix'    => 'v1/tags',
         'as'        => 'api.v1.tags.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{tagOrId}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -636,7 +636,7 @@ Route::group(
         'prefix'    => 'v1/transactions',
         'as'        => 'api.v1.transactions.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{transactionGroup}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -654,7 +654,7 @@ Route::group(
         'prefix'    => 'v1/transaction-journals',
         'as'        => 'api.v1.transaction-journals.',
     ],
-    static function () {
+    static function (): void {
         Route::get('{tj}', ['uses' => 'ShowController@showJournal', 'as' => 'show']);
         Route::delete('{tj}', ['uses' => 'DestroyController@destroyJournal', 'as' => 'delete']);
 
@@ -669,7 +669,7 @@ Route::group(
         'prefix'    => 'v1/currencies',
         'as'        => 'api.v1.currencies.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('default', ['uses' => 'ShowController@showDefault', 'as' => 'show.default']);
@@ -699,7 +699,7 @@ Route::group(
         'prefix'    => 'v1/transaction-links',
         'as'        => 'api.v1.transaction-links.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{journalLink}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -715,7 +715,7 @@ Route::group(
         'prefix'    => 'v1/link-types',
         'as'        => 'api.v1.link-types.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{linkType}', ['uses' => 'ShowController@show', 'as' => 'show']);
@@ -732,7 +732,7 @@ Route::group(
         'prefix'    => 'v1/search',
         'as'        => 'api.v1.search.',
     ],
-    static function () {
+    static function (): void {
         Route::get('transactions', ['uses' => 'TransactionController@search', 'as' => 'transactions']);
         Route::get('accounts', ['uses' => 'AccountController@search', 'as' => 'accounts']);
     }
@@ -746,7 +746,7 @@ Route::group(
         'prefix'    => 'v1/about',
         'as'        => 'api.v1.about.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'AboutController@about', 'as' => 'index']);
         Route::get('user', ['uses' => 'AboutController@user', 'as' => 'user']);
     }
@@ -758,7 +758,7 @@ Route::group(
         'prefix'    => 'v1/configuration',
         'as'        => 'api.v1.configuration.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ConfigurationController@index', 'as' => 'index']);
         Route::get('{eitherConfigKey}', ['uses' => 'ConfigurationController@show', 'as' => 'show']);
         Route::put('{dynamicConfigKey}', ['uses' => 'ConfigurationController@update', 'as' => 'update']);
@@ -772,7 +772,7 @@ Route::group(
         'prefix'     => 'v1/users',
         'as'         => 'api.v1.users.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'UserController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'UserController@store', 'as' => 'store']);
         Route::get('{user}', ['uses' => 'UserController@show', 'as' => 'show']);
@@ -790,7 +790,7 @@ Route::group(
         'prefix'    => 'v1/preferences',
         'as'        => 'api.v1.preferences.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'PreferencesController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'PreferencesController@store', 'as' => 'store']);
         Route::get('{preference}', ['uses' => 'PreferencesController@show', 'as' => 'show']);
@@ -805,7 +805,7 @@ Route::group(
         'prefix'    => 'v1/webhooks',
         'as'        => 'api.v1.webhooks.',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ShowController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'StoreController@store', 'as' => 'store']);
         Route::get('{webhook}', ['uses' => 'ShowController@show', 'as' => 'show']);
diff --git a/routes/breadcrumbs.php b/routes/breadcrumbs.php
index f6be8c699a..2b17956637 100644
--- a/routes/breadcrumbs.php
+++ b/routes/breadcrumbs.php
@@ -65,14 +65,14 @@ if (!function_exists('limitStringLength')) {
 // HOME
 Breadcrumbs::for(
     'home',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->push(trans('breadcrumbs.home'), route('index'));
     }
 );
 
 Breadcrumbs::for(
     'index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->push(trans('breadcrumbs.home'), route('index'));
     }
 );
@@ -80,14 +80,14 @@ Breadcrumbs::for(
 // ACCOUNTS
 Breadcrumbs::for(
     'accounts.index',
-    static function (Generator $breadcrumbs, string $what) {
+    static function (Generator $breadcrumbs, string $what): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.'.strtolower(e($what)).'_accounts'), route('accounts.index', [$what]));
     }
 );
 Breadcrumbs::for( // inactive
     'accounts.inactive.index',
-    static function (Generator $breadcrumbs, string $what) {
+    static function (Generator $breadcrumbs, string $what): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.'.strtolower(e($what)).'_accounts_inactive'), route('accounts.inactive.index', [$what]));
     }
@@ -95,7 +95,7 @@ Breadcrumbs::for( // inactive
 
 Breadcrumbs::for(
     'accounts.create',
-    static function (Generator $breadcrumbs, string $what) {
+    static function (Generator $breadcrumbs, string $what): void {
         $breadcrumbs->parent('accounts.index', $what);
         $breadcrumbs->push(trans('firefly.new_'.strtolower(e($what)).'_account'), route('accounts.create', [$what]));
     }
@@ -103,7 +103,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.show',
-    static function (Generator $breadcrumbs, Account $account, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, Account $account, Carbon $start = null, Carbon $end = null): void {
         $what = config('firefly.shortNamesByFullName.'.$account->accountType->type);
 
         $breadcrumbs->parent('accounts.index', $what);
@@ -123,7 +123,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.show.all',
-    static function (Generator $breadcrumbs, Account $account) {
+    static function (Generator $breadcrumbs, Account $account): void {
         $what = config('firefly.shortNamesByFullName.'.$account->accountType->type);
 
         $breadcrumbs->parent('accounts.index', $what);
@@ -133,7 +133,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.reconcile',
-    static function (Generator $breadcrumbs, Account $account) {
+    static function (Generator $breadcrumbs, Account $account): void {
         $breadcrumbs->parent('accounts.show', $account);
         $breadcrumbs->push(trans('firefly.reconcile_account', ['account' => $account->name]), route('accounts.reconcile', [$account->id]));
     }
@@ -141,7 +141,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.reconcile.show',
-    static function (Generator $breadcrumbs, Account $account, TransactionJournal $journal) {
+    static function (Generator $breadcrumbs, Account $account, TransactionJournal $journal): void {
         $breadcrumbs->parent('accounts.show', $account);
         $title = trans('firefly.reconciliation').' "'.$journal->description.'"';
         $breadcrumbs->push($title, route('accounts.reconcile.show', [$journal->id]));
@@ -150,7 +150,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.delete',
-    static function (Generator $breadcrumbs, Account $account) {
+    static function (Generator $breadcrumbs, Account $account): void {
         $breadcrumbs->parent('accounts.show', $account);
         $breadcrumbs->push(trans('firefly.delete_account', ['name' => limitStringLength($account->name)]), route('accounts.delete', [$account->id]));
     }
@@ -158,7 +158,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'accounts.edit',
-    static function (Generator $breadcrumbs, Account $account) {
+    static function (Generator $breadcrumbs, Account $account): void {
         $breadcrumbs->parent('accounts.show', $account);
         $what = config('firefly.shortNamesByFullName.'.$account->accountType->type);
 
@@ -172,7 +172,7 @@ Breadcrumbs::for(
 // ADMIN
 Breadcrumbs::for(
     'admin.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.administration'), route('admin.index'));
     }
@@ -180,7 +180,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.users',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.index');
         $breadcrumbs->push(trans('firefly.list_all_users'), route('admin.users'));
     }
@@ -188,21 +188,21 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.users.show',
-    static function (Generator $breadcrumbs, User $user) {
+    static function (Generator $breadcrumbs, User $user): void {
         $breadcrumbs->parent('admin.users');
         $breadcrumbs->push(trans('firefly.single_user_administration', ['email' => $user->email]), route('admin.users.show', [$user->id]));
     }
 );
 Breadcrumbs::for(
     'admin.users.edit',
-    static function (Generator $breadcrumbs, User $user) {
+    static function (Generator $breadcrumbs, User $user): void {
         $breadcrumbs->parent('admin.users');
         $breadcrumbs->push(trans('firefly.edit_user', ['email' => $user->email]), route('admin.users.edit', [$user->id]));
     }
 );
 Breadcrumbs::for(
     'admin.users.delete',
-    static function (Generator $breadcrumbs, User $user) {
+    static function (Generator $breadcrumbs, User $user): void {
         $breadcrumbs->parent('admin.users');
         $breadcrumbs->push(trans('firefly.delete_user', ['email' => $user->email]), route('admin.users.delete', [$user->id]));
     }
@@ -210,7 +210,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.users.domains',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.index');
         $breadcrumbs->push(trans('firefly.blocked_domains'), route('admin.users.domains'));
     }
@@ -218,14 +218,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.configuration.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.index');
         $breadcrumbs->push(trans('firefly.instance_configuration'), route('admin.configuration.index'));
     }
 );
 Breadcrumbs::for(
     'admin.update-check',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.index');
         $breadcrumbs->push(trans('firefly.update_check_title'), route('admin.update-check'));
     }
@@ -233,7 +233,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.links.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.index');
         $breadcrumbs->push(trans('firefly.journal_link_configuration'), route('admin.links.index'));
     }
@@ -241,7 +241,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.links.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('admin.links.index');
         $breadcrumbs->push(trans('firefly.create_new_link_type'), route('admin.links.create'));
     }
@@ -249,7 +249,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.links.show',
-    static function (Generator $breadcrumbs, LinkType $linkType) {
+    static function (Generator $breadcrumbs, LinkType $linkType): void {
         $breadcrumbs->parent('admin.links.index');
         $breadcrumbs->push(trans('firefly.overview_for_link', ['name' => limitStringLength($linkType->name)]), route('admin.links.show', [$linkType->id]));
     }
@@ -257,7 +257,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.links.edit',
-    static function (Generator $breadcrumbs, LinkType $linkType) {
+    static function (Generator $breadcrumbs, LinkType $linkType): void {
         $breadcrumbs->parent('admin.links.index');
         $breadcrumbs->push(trans('firefly.edit_link_type', ['name' => limitStringLength($linkType->name)]), route('admin.links.edit', [$linkType->id]));
     }
@@ -265,7 +265,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'admin.links.delete',
-    static function (Generator $breadcrumbs, LinkType $linkType) {
+    static function (Generator $breadcrumbs, LinkType $linkType): void {
         $breadcrumbs->parent('admin.links.index');
         $breadcrumbs->push(trans('firefly.delete_link_type', ['name' => limitStringLength($linkType->name)]), route('admin.links.delete', [$linkType->id]));
     }
@@ -273,7 +273,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.link.delete',
-    static function (Generator $breadcrumbs, TransactionJournalLink $link) {
+    static function (Generator $breadcrumbs, TransactionJournalLink $link): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.delete_journal_link'), route('transactions.link.delete', $link->id));
     }
@@ -282,7 +282,7 @@ Breadcrumbs::for(
 // ATTACHMENTS
 Breadcrumbs::for(
     'attachments.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.attachments'), route('attachments.index'));
     }
@@ -290,7 +290,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'attachments.edit',
-    static function (Generator $breadcrumbs, Attachment $attachment) {
+    static function (Generator $breadcrumbs, Attachment $attachment): void {
         $object = $attachment->attachable;
         if ($object instanceof TransactionJournal) {
             $group = $object->transactionGroup;
@@ -310,7 +310,7 @@ Breadcrumbs::for(
 );
 Breadcrumbs::for(
     'attachments.delete',
-    static function (Generator $breadcrumbs, Attachment $attachment) {
+    static function (Generator $breadcrumbs, Attachment $attachment): void {
         $object = $attachment->attachable;
         if ($object instanceof TransactionJournal) {
             $breadcrumbs->parent('transactions.show', $object->transactionGroup);
@@ -328,14 +328,14 @@ Breadcrumbs::for(
 // BILLS
 Breadcrumbs::for(
     'bills.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.bills'), route('bills.index'));
     }
 );
 Breadcrumbs::for(
     'bills.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('bills.index');
         $breadcrumbs->push(trans('breadcrumbs.newBill'), route('bills.create'));
     }
@@ -343,14 +343,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'bills.edit',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('bills.show', $bill);
         $breadcrumbs->push(trans('breadcrumbs.edit_bill', ['name' => limitStringLength($bill->name)]), route('bills.edit', [$bill->id]));
     }
 );
 Breadcrumbs::for(
     'bills.delete',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('bills.show', $bill);
         $breadcrumbs->push(trans('breadcrumbs.delete_bill', ['name' => limitStringLength($bill->name)]), route('bills.delete', [$bill->id]));
     }
@@ -358,7 +358,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'bills.show',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('bills.index');
         $breadcrumbs->push(limitStringLength($bill->name), route('bills.show', [$bill->id]));
     }
@@ -367,14 +367,14 @@ Breadcrumbs::for(
 // SUBSCRIPTIONS
 Breadcrumbs::for(
     'subscriptions.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.bills'), route('subscriptions.index'));
     }
 );
 Breadcrumbs::for(
     'subscriptions.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('subscriptions.index');
         $breadcrumbs->push(trans('breadcrumbs.newBill'), route('subscriptions.create'));
     }
@@ -382,14 +382,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'subscriptions.edit',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('subscriptions.show', $bill);
         $breadcrumbs->push(trans('breadcrumbs.edit_bill', ['name' => limitStringLength($bill->name)]), route('subscriptions.edit', [$bill->id]));
     }
 );
 Breadcrumbs::for(
     'subscriptions.delete',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('subscriptions.show', $bill);
         $breadcrumbs->push(trans('breadcrumbs.delete_bill', ['name' => limitStringLength($bill->name)]), route('subscriptions.delete', [$bill->id]));
     }
@@ -397,7 +397,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'subscriptions.show',
-    static function (Generator $breadcrumbs, Bill $bill) {
+    static function (Generator $breadcrumbs, Bill $bill): void {
         $breadcrumbs->parent('subscriptions.index');
         $breadcrumbs->push(limitStringLength($bill->name), route('subscriptions.show', [$bill->id]));
     }
@@ -406,14 +406,14 @@ Breadcrumbs::for(
 // BUDGETS
 Breadcrumbs::for(
     'budgets.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.budgets'), route('budgets.index'));
     }
 );
 Breadcrumbs::for(
     'budgets.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('budgets.index');
         $breadcrumbs->push(trans('firefly.create_new_budget'), route('budgets.create'));
     }
@@ -421,14 +421,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'budgets.edit',
-    static function (Generator $breadcrumbs, Budget $budget) {
+    static function (Generator $breadcrumbs, Budget $budget): void {
         $breadcrumbs->parent('budgets.show', $budget);
         $breadcrumbs->push(trans('firefly.edit_budget', ['name' => limitStringLength($budget->name)]), route('budgets.edit', [$budget->id]));
     }
 );
 Breadcrumbs::for(
     'budgets.delete',
-    static function (Generator $breadcrumbs, Budget $budget) {
+    static function (Generator $breadcrumbs, Budget $budget): void {
         $breadcrumbs->parent('budgets.show', $budget);
         $breadcrumbs->push(trans('firefly.delete_budget', ['name' => limitStringLength($budget->name)]), route('budgets.delete', [$budget->id]));
     }
@@ -436,7 +436,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'budgets.no-budget',
-    static function (Generator $breadcrumbs, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, Carbon $start = null, Carbon $end = null): void {
         $breadcrumbs->parent('budgets.index');
         $breadcrumbs->push(trans('firefly.journals_without_budget'), route('budgets.no-budget'));
         if (null !== $start && null !== $end) {
@@ -454,7 +454,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'budgets.no-budget-all',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('budgets.index');
         $breadcrumbs->push(trans('firefly.journals_without_budget'), route('budgets.no-budget'));
         $breadcrumbs->push(trans('firefly.everything'), route('budgets.no-budget-all'));
@@ -463,7 +463,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'budgets.show',
-    static function (Generator $breadcrumbs, Budget $budget) {
+    static function (Generator $breadcrumbs, Budget $budget): void {
         $breadcrumbs->parent('budgets.index');
         $breadcrumbs->push(limitStringLength($budget->name), route('budgets.show', [$budget->id]));
         $breadcrumbs->push(trans('firefly.everything'), route('budgets.show', [$budget->id]));
@@ -472,7 +472,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'budgets.show.limit',
-    static function (Generator $breadcrumbs, Budget $budget, BudgetLimit $budgetLimit) {
+    static function (Generator $breadcrumbs, Budget $budget, BudgetLimit $budgetLimit): void {
         $breadcrumbs->parent('budgets.index');
         $breadcrumbs->push(limitStringLength($budget->name), route('budgets.show', [$budget->id]));
 
@@ -494,14 +494,14 @@ Breadcrumbs::for(
 // CATEGORIES
 Breadcrumbs::for(
     'categories.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.categories'), route('categories.index'));
     }
 );
 Breadcrumbs::for(
     'categories.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('categories.index');
         $breadcrumbs->push(trans('firefly.new_category'), route('categories.create'));
     }
@@ -509,14 +509,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'categories.edit',
-    static function (Generator $breadcrumbs, Category $category) {
+    static function (Generator $breadcrumbs, Category $category): void {
         $breadcrumbs->parent('categories.show.all', $category);
         $breadcrumbs->push(trans('firefly.edit_category', ['name' => limitStringLength($category->name)]), route('categories.edit', [$category->id]));
     }
 );
 Breadcrumbs::for(
     'categories.delete',
-    static function (Generator $breadcrumbs, Category $category) {
+    static function (Generator $breadcrumbs, Category $category): void {
         $breadcrumbs->parent('categories.show', $category);
         $breadcrumbs->push(trans('firefly.delete_category', ['name' => limitStringLength($category->name)]), route('categories.delete', [$category->id]));
     }
@@ -524,7 +524,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'categories.show',
-    static function (Generator $breadcrumbs, Category $category, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, Category $category, Carbon $start = null, Carbon $end = null): void {
         $breadcrumbs->parent('categories.index');
         $breadcrumbs->push(limitStringLength($category->name), route('categories.show', [$category->id]));
         if (null !== $start && null !== $end) {
@@ -542,7 +542,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'categories.show.all',
-    static function (Generator $breadcrumbs, Category $category) {
+    static function (Generator $breadcrumbs, Category $category): void {
         $breadcrumbs->parent('categories.index');
         $breadcrumbs->push(limitStringLength($category->name), route('categories.show', [$category->id]));
         $breadcrumbs->push(trans('firefly.everything'), route('categories.show.all', [$category->id]));
@@ -551,7 +551,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'categories.no-category',
-    static function (Generator $breadcrumbs, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, Carbon $start = null, Carbon $end = null): void {
         $breadcrumbs->parent('categories.index');
         $breadcrumbs->push(trans('firefly.journals_without_category'), route('categories.no-category'));
         if (null !== $start && null !== $end) {
@@ -569,7 +569,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'categories.no-category.all',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('categories.index');
         $breadcrumbs->push(trans('firefly.journals_without_category'), route('categories.no-category'));
         $breadcrumbs->push(trans('firefly.everything'), route('categories.no-category.all'));
@@ -579,7 +579,7 @@ Breadcrumbs::for(
 // CURRENCIES
 Breadcrumbs::for(
     'currencies.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.currencies'), route('currencies.index'));
     }
@@ -587,7 +587,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'currencies.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('currencies.index');
         $breadcrumbs->push(trans('firefly.create_currency'), route('currencies.create'));
     }
@@ -595,14 +595,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'currencies.edit',
-    static function (Generator $breadcrumbs, TransactionCurrency $currency) {
+    static function (Generator $breadcrumbs, TransactionCurrency $currency): void {
         $breadcrumbs->parent('currencies.index');
         $breadcrumbs->push(trans('breadcrumbs.edit_currency', ['name' => $currency->name]), route('currencies.edit', [$currency->id]));
     }
 );
 Breadcrumbs::for(
     'currencies.delete',
-    static function (Generator $breadcrumbs, TransactionCurrency $currency) {
+    static function (Generator $breadcrumbs, TransactionCurrency $currency): void {
         $breadcrumbs->parent('currencies.index');
         $breadcrumbs->push(trans('breadcrumbs.delete_currency', ['name' => $currency->name]), route('currencies.delete', [$currency->id]));
     }
@@ -611,7 +611,7 @@ Breadcrumbs::for(
 // EXPORT
 Breadcrumbs::for(
     'export.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.export_data_bc'), route('export.index'));
     }
@@ -620,14 +620,14 @@ Breadcrumbs::for(
 // PIGGY BANKS
 Breadcrumbs::for(
     'piggy-banks.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.piggyBanks'), route('piggy-banks.index'));
     }
 );
 Breadcrumbs::for(
     'piggy-banks.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('piggy-banks.index');
         $breadcrumbs->push(trans('breadcrumbs.newPiggyBank'), route('piggy-banks.create'));
     }
@@ -635,14 +635,14 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'piggy-banks.edit',
-    static function (Generator $breadcrumbs, PiggyBank $piggyBank) {
+    static function (Generator $breadcrumbs, PiggyBank $piggyBank): void {
         $breadcrumbs->parent('piggy-banks.show', $piggyBank);
         $breadcrumbs->push(trans('breadcrumbs.edit_piggyBank', ['name' => $piggyBank->name]), route('piggy-banks.edit', [$piggyBank->id]));
     }
 );
 Breadcrumbs::for(
     'piggy-banks.delete',
-    static function (Generator $breadcrumbs, PiggyBank $piggyBank) {
+    static function (Generator $breadcrumbs, PiggyBank $piggyBank): void {
         $breadcrumbs->parent('piggy-banks.show', $piggyBank);
         $breadcrumbs->push(trans('firefly.delete_piggy_bank', ['name' => $piggyBank->name]), route('piggy-banks.delete', [$piggyBank->id]));
     }
@@ -650,7 +650,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'piggy-banks.show',
-    static function (Generator $breadcrumbs, PiggyBank $piggyBank) {
+    static function (Generator $breadcrumbs, PiggyBank $piggyBank): void {
         $breadcrumbs->parent('piggy-banks.index');
         $breadcrumbs->push($piggyBank->name, route('piggy-banks.show', [$piggyBank->id]));
     }
@@ -658,7 +658,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'piggy-banks.add-money-mobile',
-    static function (Generator $breadcrumbs, PiggyBank $piggyBank) {
+    static function (Generator $breadcrumbs, PiggyBank $piggyBank): void {
         $breadcrumbs->parent('piggy-banks.show', $piggyBank);
         $breadcrumbs->push(trans('firefly.add_money_to_piggy', ['name' => $piggyBank->name]), route('piggy-banks.add-money-mobile', [$piggyBank->id]));
     }
@@ -666,7 +666,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'piggy-banks.remove-money-mobile',
-    static function (Generator $breadcrumbs, PiggyBank $piggyBank) {
+    static function (Generator $breadcrumbs, PiggyBank $piggyBank): void {
         $breadcrumbs->parent('piggy-banks.show', $piggyBank);
         $breadcrumbs->push(
             trans('firefly.remove_money_from_piggy_title', ['name' => $piggyBank->name]),
@@ -678,7 +678,7 @@ Breadcrumbs::for(
 // PREFERENCES
 Breadcrumbs::for(
     'preferences.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.preferences'), route('preferences.index'));
     }
@@ -686,7 +686,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'profile.code',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.profile'), route('profile.index'));
     }
@@ -694,7 +694,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'profile.new-backup-codes',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.profile'), route('profile.index'));
     }
@@ -702,7 +702,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'profile.logout-others',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.logout_others'), route('profile.logout-others'));
     }
@@ -711,14 +711,14 @@ Breadcrumbs::for(
 // PROFILE
 Breadcrumbs::for(
     'profile.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.profile'), route('profile.index'));
     }
 );
 Breadcrumbs::for(
     'profile.change-password',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('profile.index');
         $breadcrumbs->push(trans('breadcrumbs.changePassword'), route('profile.change-password'));
     }
@@ -726,7 +726,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'profile.change-email',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('profile.index');
         $breadcrumbs->push(trans('breadcrumbs.change_email'), route('profile.change-email'));
     }
@@ -734,7 +734,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'profile.delete-account',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('profile.index');
         $breadcrumbs->push(trans('firefly.delete_account'), route('profile.delete-account'));
     }
@@ -743,7 +743,7 @@ Breadcrumbs::for(
 // REPORTS
 Breadcrumbs::for(
     'reports.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.reports'), route('reports.index'));
     }
@@ -751,7 +751,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'reports.report.audit',
-    static function (Generator $breadcrumbs, string $accountIds, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -764,7 +764,7 @@ Breadcrumbs::for(
 );
 Breadcrumbs::for(
     'reports.report.budget',
-    static function (Generator $breadcrumbs, string $accountIds, string $budgetIds, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, string $budgetIds, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -778,7 +778,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'reports.report.tag',
-    static function (Generator $breadcrumbs, string $accountIds, string $tagTags, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, string $tagTags, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -792,7 +792,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'reports.report.category',
-    static function (Generator $breadcrumbs, string $accountIds, string $categoryIds, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, string $categoryIds, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -806,7 +806,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'reports.report.double',
-    static function (Generator $breadcrumbs, string $accountIds, string $doubleIds, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, string $doubleIds, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -820,7 +820,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'reports.report.default',
-    static function (Generator $breadcrumbs, string $accountIds, Carbon $start, Carbon $end) {
+    static function (Generator $breadcrumbs, string $accountIds, Carbon $start, Carbon $end): void {
         $breadcrumbs->parent('reports.index');
 
         $monthFormat = (string)trans('config.month_and_day_js');
@@ -835,7 +835,7 @@ Breadcrumbs::for(
 // New user Controller
 Breadcrumbs::for(
     'new-user.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.getting_started'), route('new-user.index'));
     }
@@ -844,14 +844,14 @@ Breadcrumbs::for(
 // Recurring transactions controller:
 Breadcrumbs::for(
     'recurring.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.recurrences'), route('recurring.index'));
     }
 );
 Breadcrumbs::for(
     'recurring.show',
-    static function (Generator $breadcrumbs, Recurrence $recurrence) {
+    static function (Generator $breadcrumbs, Recurrence $recurrence): void {
         $breadcrumbs->parent('recurring.index');
         $breadcrumbs->push($recurrence->title, route('recurring.show', [$recurrence->id]));
     }
@@ -859,7 +859,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'recurring.delete',
-    static function (Generator $breadcrumbs, Recurrence $recurrence) {
+    static function (Generator $breadcrumbs, Recurrence $recurrence): void {
         $breadcrumbs->parent('recurring.index');
         $breadcrumbs->push(trans('firefly.delete_recurring', ['title' => $recurrence->title]), route('recurring.delete', [$recurrence->id]));
     }
@@ -867,7 +867,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'recurring.edit',
-    static function (Generator $breadcrumbs, Recurrence $recurrence) {
+    static function (Generator $breadcrumbs, Recurrence $recurrence): void {
         $breadcrumbs->parent('recurring.index');
         $breadcrumbs->push(trans('firefly.edit_recurrence', ['title' => $recurrence->title]), route('recurring.edit', [$recurrence->id]));
     }
@@ -875,7 +875,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'recurring.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('recurring.index');
         $breadcrumbs->push(trans('firefly.create_new_recurrence'), route('recurring.create'));
     }
@@ -883,7 +883,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'recurring.create-from-journal',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('recurring.index');
         $breadcrumbs->push(trans('firefly.create_new_recurrence'), route('recurring.create'));
     }
@@ -892,7 +892,7 @@ Breadcrumbs::for(
 // Rules
 Breadcrumbs::for(
     'rules.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('firefly.rules'), route('rules.index'));
     }
@@ -900,7 +900,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rules.create',
-    static function (Generator $breadcrumbs, RuleGroup $ruleGroup = null) {
+    static function (Generator $breadcrumbs, RuleGroup $ruleGroup = null): void {
         $breadcrumbs->parent('rules.index');
         if (null === $ruleGroup) {
             $breadcrumbs->push(trans('firefly.make_new_rule_no_group'), route('rules.create'));
@@ -913,7 +913,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rules.create-from-bill',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.make_new_rule_no_group'), route('rules.create'));
     }
@@ -921,7 +921,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rules.create-from-journal',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.make_new_rule_no_group'), route('rules.create'));
     }
@@ -929,35 +929,35 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rules.edit',
-    static function (Generator $breadcrumbs, Rule $rule) {
+    static function (Generator $breadcrumbs, Rule $rule): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.edit_rule', ['title' => $rule->title]), route('rules.edit', [$rule]));
     }
 );
 Breadcrumbs::for(
     'rules.delete',
-    static function (Generator $breadcrumbs, Rule $rule) {
+    static function (Generator $breadcrumbs, Rule $rule): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.delete_rule', ['title' => $rule->title]), route('rules.delete', [$rule]));
     }
 );
 Breadcrumbs::for(
     'rule-groups.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.make_new_rule_group'), route('rule-groups.create'));
     }
 );
 Breadcrumbs::for(
     'rule-groups.edit',
-    static function (Generator $breadcrumbs, RuleGroup $ruleGroup) {
+    static function (Generator $breadcrumbs, RuleGroup $ruleGroup): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.edit_rule_group', ['title' => $ruleGroup->title]), route('rule-groups.edit', [$ruleGroup]));
     }
 );
 Breadcrumbs::for(
     'rule-groups.delete',
-    static function (Generator $breadcrumbs, RuleGroup $ruleGroup) {
+    static function (Generator $breadcrumbs, RuleGroup $ruleGroup): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(trans('firefly.delete_rule_group', ['title' => $ruleGroup->title]), route('rule-groups.delete', [$ruleGroup]));
     }
@@ -965,7 +965,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rules.select-transactions',
-    static function (Generator $breadcrumbs, Rule $rule) {
+    static function (Generator $breadcrumbs, Rule $rule): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(
             trans('firefly.rule_select_transactions', ['title' => $rule->title]),
@@ -976,7 +976,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'rule-groups.select-transactions',
-    static function (Generator $breadcrumbs, RuleGroup $ruleGroup) {
+    static function (Generator $breadcrumbs, RuleGroup $ruleGroup): void {
         $breadcrumbs->parent('rules.index');
         $breadcrumbs->push(
             trans('firefly.rule_group_select_transactions', ['title' => $ruleGroup->title]),
@@ -988,7 +988,7 @@ Breadcrumbs::for(
 // SEARCH
 Breadcrumbs::for(
     'search.index',
-    static function (Generator $breadcrumbs, $query) {
+    static function (Generator $breadcrumbs, $query): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.search_result', ['query' => $query]), route('search.index'));
     }
@@ -997,7 +997,7 @@ Breadcrumbs::for(
 // TAGS
 Breadcrumbs::for(
     'tags.index',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.tags'), route('tags.index'));
     }
@@ -1005,7 +1005,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'tags.create',
-    static function (Generator $breadcrumbs) {
+    static function (Generator $breadcrumbs): void {
         $breadcrumbs->parent('tags.index');
         $breadcrumbs->push(trans('breadcrumbs.createTag'), route('tags.create'));
     }
@@ -1013,7 +1013,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'tags.edit',
-    static function (Generator $breadcrumbs, Tag $tag) {
+    static function (Generator $breadcrumbs, Tag $tag): void {
         $breadcrumbs->parent('tags.show', $tag);
         $breadcrumbs->push(trans('breadcrumbs.edit_tag', ['tag' => $tag->tag]), route('tags.edit', [$tag->id]));
     }
@@ -1021,7 +1021,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'tags.delete',
-    static function (Generator $breadcrumbs, Tag $tag) {
+    static function (Generator $breadcrumbs, Tag $tag): void {
         $breadcrumbs->parent('tags.show', $tag);
         $breadcrumbs->push(trans('breadcrumbs.delete_tag', ['tag' => $tag->tag]), route('tags.delete', [$tag->id]));
     }
@@ -1029,7 +1029,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'tags.show',
-    static function (Generator $breadcrumbs, Tag $tag, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, Tag $tag, Carbon $start = null, Carbon $end = null): void {
         $breadcrumbs->parent('tags.index');
 
         $breadcrumbs->push($tag->tag, route('tags.show', [$tag->id, $start, $end]));
@@ -1048,7 +1048,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'tags.show.all',
-    static function (Generator $breadcrumbs, Tag $tag) {
+    static function (Generator $breadcrumbs, Tag $tag): void {
         $breadcrumbs->parent('tags.index');
         $breadcrumbs->push($tag->tag, route('tags.show', [$tag->id]));
         $title = (string)trans('firefly.all_journals_for_tag', ['tag' => $tag->tag]);
@@ -1060,7 +1060,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.index',
-    static function (Generator $breadcrumbs, string $what, Carbon $start = null, Carbon $end = null) {
+    static function (Generator $breadcrumbs, string $what, Carbon $start = null, Carbon $end = null): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.'.$what.'_list'), route('transactions.index', [$what]));
 
@@ -1080,7 +1080,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.index.all',
-    static function (Generator $breadcrumbs, string $what) {
+    static function (Generator $breadcrumbs, string $what): void {
         $breadcrumbs->parent('home');
         $breadcrumbs->push(trans('breadcrumbs.'.$what.'_list'), route('transactions.index', [$what]));
     }
@@ -1088,7 +1088,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.create',
-    static function (Generator $breadcrumbs, string $objectType) {
+    static function (Generator $breadcrumbs, string $objectType): void {
         $breadcrumbs->parent('transactions.index', $objectType);
         $breadcrumbs->push(trans(sprintf('breadcrumbs.create_%s', strtolower($objectType))), route('transactions.create', [$objectType]));
     }
@@ -1096,7 +1096,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.edit',
-    static function (Generator $breadcrumbs, TransactionGroup $group) {
+    static function (Generator $breadcrumbs, TransactionGroup $group): void {
         $breadcrumbs->parent('transactions.show', $group);
 
         /** @var TransactionJournal $first */
@@ -1112,7 +1112,7 @@ Breadcrumbs::for(
 // also edit reconciliations:
 Breadcrumbs::for(
     'accounts.reconcile.edit',
-    static function (Generator $breadcrumbs, TransactionJournal $journal) {
+    static function (Generator $breadcrumbs, TransactionJournal $journal): void {
         $breadcrumbs->parent('transactions.show', $journal);
         $breadcrumbs->push(
             trans('breadcrumbs.edit_reconciliation', ['description' => limitStringLength($journal->description)]),
@@ -1123,7 +1123,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.delete',
-    static function (Generator $breadcrumbs, TransactionGroup $group) {
+    static function (Generator $breadcrumbs, TransactionGroup $group): void {
         $breadcrumbs->parent('transactions.show', $group);
 
         $journal = $group->transactionJournals->first();
@@ -1136,7 +1136,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.show',
-    static function (Generator $breadcrumbs, TransactionGroup $group) {
+    static function (Generator $breadcrumbs, TransactionGroup $group): void {
         /** @var TransactionJournal $first */
         $first = $group->transactionJournals()->first();
         $type  = strtolower($first->transactionType->type);
@@ -1164,7 +1164,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.convert.index',
-    static function (Generator $breadcrumbs, TransactionGroup $group, string $groupTitle) {
+    static function (Generator $breadcrumbs, TransactionGroup $group, string $groupTitle): void {
         $breadcrumbs->parent('transactions.show', $group);
         $breadcrumbs->push(
             trans('firefly.breadcrumb_convert_group', ['description' => limitStringLength($groupTitle)]),
@@ -1190,7 +1190,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'transactions.mass.delete',
-    static function (Generator $breadcrumbs, array $journals) {
+    static function (Generator $breadcrumbs, array $journals): void {
         $objectType = strtolower(reset($journals)['transaction_type_type']);
         $breadcrumbs->parent('transactions.index', $objectType);
         $breadcrumbs->push(trans('firefly.mass_edit_journals'), route('transactions.mass.delete', ['']));
@@ -1225,7 +1225,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'object-groups.edit',
-    static function (Generator $breadcrumbs, ObjectGroup $objectGroup) {
+    static function (Generator $breadcrumbs, ObjectGroup $objectGroup): void {
         $breadcrumbs->parent('object-groups.index');
         $breadcrumbs->push(trans('breadcrumbs.edit_object_group', ['title' => $objectGroup->title]), route('object-groups.edit', [$objectGroup->id]));
     }
@@ -1233,7 +1233,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'object-groups.delete',
-    static function (Generator $breadcrumbs, ObjectGroup $objectGroup) {
+    static function (Generator $breadcrumbs, ObjectGroup $objectGroup): void {
         $breadcrumbs->parent('object-groups.index');
         $breadcrumbs->push(trans('breadcrumbs.delete_object_group', ['title' => $objectGroup->title]), route('object-groups.delete', [$objectGroup->id]));
     }
@@ -1257,7 +1257,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'webhooks.show',
-    static function (Generator $breadcrumbs, Webhook $webhook) {
+    static function (Generator $breadcrumbs, Webhook $webhook): void {
         $breadcrumbs->parent('webhooks.index');
         $breadcrumbs->push(limitStringLength($webhook->title), route('webhooks.show', [$webhook->id]));
     }
@@ -1265,7 +1265,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'webhooks.delete',
-    static function (Generator $breadcrumbs, Webhook $webhook) {
+    static function (Generator $breadcrumbs, Webhook $webhook): void {
         $breadcrumbs->parent('webhooks.show', $webhook);
         $breadcrumbs->push(trans('firefly.delete_webhook', ['title' => limitStringLength($webhook->title)]), route('webhooks.delete', [$webhook->id]));
     }
@@ -1273,7 +1273,7 @@ Breadcrumbs::for(
 
 Breadcrumbs::for(
     'webhooks.edit',
-    static function (Generator $breadcrumbs, Webhook $webhook) {
+    static function (Generator $breadcrumbs, Webhook $webhook): void {
         $breadcrumbs->parent('webhooks.show', $webhook);
         $breadcrumbs->push(trans('firefly.edit_webhook', ['title' => limitStringLength($webhook->title)]), route('webhooks.edit', [$webhook->id]));
     }
diff --git a/routes/web.php b/routes/web.php
index d1a342679c..69a96d1ab8 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -31,7 +31,7 @@ Route::group(
         'as'        => 'installer.',
         'prefix'    => 'install',
     ],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'InstallController@index', 'as' => 'index']);
         Route::post('runCommand', ['uses' => 'InstallController@runCommand', 'as' => 'runCommand']);
     }
@@ -39,14 +39,14 @@ Route::group(
 
 Route::group(
     ['middleware' => 'binders-only', 'namespace' => 'FireflyIII\Http\Controllers\System', 'as' => 'cron.', 'prefix' => 'cron'],
-    static function () {
+    static function (): void {
         Route::get('run/{cliToken}', ['uses' => 'CronController@cron', 'as' => 'cron']);
     }
 );
 
 Route::group(
     ['middleware' => 'binders-only', 'namespace' => 'FireflyIII\Http\Controllers\System'],
-    static function () {
+    static function (): void {
         Route::get('offline', static fn () => view('errors.offline'));
         Route::get('health', ['uses' => 'HealthcheckController@check', 'as' => 'healthcheck']);
     }
@@ -55,7 +55,7 @@ Route::group(
 // These routes only work when the user is NOT logged in.
 Route::group(
     ['middleware' => 'user-not-logged-in', 'namespace' => 'FireflyIII\Http\Controllers'],
-    static function () {
+    static function (): void {
         // Authentication Routes...
         Route::get('login', ['uses' => 'Auth\LoginController@showLoginForm', 'as' => 'login']);
         Route::post('login', ['uses' => 'Auth\LoginController@login', 'as' => 'login.post']);
@@ -80,7 +80,7 @@ Route::group(
 // For some other routes, it is only relevant that the user is authenticated.
 Route::group(
     ['middleware' => 'user-simple-auth', 'namespace' => 'FireflyIII\Http\Controllers'],
-    static function () {
+    static function (): void {
         Route::get('error', ['uses' => 'DebugController@displayError', 'as' => 'error']);
         Route::post('logout', ['uses' => 'Auth\LoginController@logout', 'as' => 'logout']);
         Route::get('flush', ['uses' => 'DebugController@flush', 'as' => 'flush']);
@@ -92,7 +92,7 @@ Route::group(
 // For the two factor routes, the user must be logged in, but NOT 2FA. Account confirmation does not matter here.
 Route::group(
     ['middleware' => 'user-logged-in-no-2fa', 'prefix' => 'two-factor', 'as' => 'two-factor.', 'namespace' => 'FireflyIII\Http\Controllers\Auth'],
-    static function () {
+    static function (): void {
         Route::post('submit', ['uses' => 'TwoFactorController@submitMFA', 'as' => 'submit']);
         Route::get('lost', ['uses' => 'TwoFactorController@lostTwoFactor', 'as' => 'lost']); // can be removed when v2 is live.
     }
@@ -103,7 +103,7 @@ Route::group(
 // Home Controller.
 Route::group(
     ['middleware' => ['user-full-auth'], 'namespace' => 'FireflyIII\Http\Controllers'],
-    static function () {
+    static function (): void {
         Route::get('/', ['uses' => 'HomeController@index', 'as' => 'index']);
         Route::get('/flash', ['uses' => 'DebugController@testFlash', 'as' => 'test-flash']);
         Route::get('/home', ['uses' => 'HomeController@index', 'as' => 'home']);
@@ -119,7 +119,7 @@ Route::group(
  */
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'inactive-accounts', 'as' => 'accounts.'],
-    static function () {
+    static function (): void {
         Route::get('{objectType}', ['uses' => 'Account\IndexController@inactive', 'as' => 'inactive.index'])->where(
             'objectType',
             'revenue|asset|expense|liabilities'
@@ -128,7 +128,7 @@ Route::group(
 );
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'accounts', 'as' => 'accounts.'],
-    static function () {
+    static function (): void {
         // show:
         Route::get('{objectType}', ['uses' => 'Account\IndexController@index', 'as' => 'index'])->where('objectType', 'revenue|asset|expense|liabilities');
 
@@ -182,7 +182,7 @@ Route::group(
 // Attachment Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'attachments', 'as' => 'attachments.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'AttachmentController@index', 'as' => 'index']);
         Route::get('edit/{attachment}', ['uses' => 'AttachmentController@edit', 'as' => 'edit']);
         Route::get('delete/{attachment}', ['uses' => 'AttachmentController@delete', 'as' => 'delete']);
@@ -197,7 +197,7 @@ Route::group(
 // Bills Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'bills', 'as' => 'bills.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'Bill\IndexController@index', 'as' => 'index']);
         Route::post('rescan/{bill}', ['uses' => 'Bill\ShowController@rescan', 'as' => 'rescan']);
         Route::get('create', ['uses' => 'Bill\CreateController@create', 'as' => 'create']);
@@ -215,7 +215,7 @@ Route::group(
 
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'subscriptions', 'as' => 'subscriptions.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'Bill\IndexController@index', 'as' => 'index']);
         Route::post('rescan/{bill}', ['uses' => 'Bill\ShowController@rescan', 'as' => 'rescan']);
         Route::get('create', ['uses' => 'Bill\CreateController@create', 'as' => 'create']);
@@ -234,7 +234,7 @@ Route::group(
 // Budget Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'budgets', 'as' => 'budgets.'],
-    static function () {
+    static function (): void {
         // delete
         Route::get('delete/{budget}', ['uses' => 'Budget\DeleteController@delete', 'as' => 'delete']);
         Route::post('destroy/{budget}', ['uses' => 'Budget\DeleteController@destroy', 'as' => 'destroy']);
@@ -270,7 +270,7 @@ Route::group(
 // Budget Limit Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'budget-limits', 'as' => 'budget-limits.'],
-    static function () {
+    static function (): void {
         Route::get('create/{budget}/{start_date}/{end_date}', ['uses' => 'Budget\BudgetLimitController@create', 'as' => 'create'])
             ->where(['start_date' => DATEFORMAT])
             ->where(['end_date' => DATEFORMAT])
@@ -286,7 +286,7 @@ Route::group(
 // Category Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'categories', 'as' => 'categories.'],
-    static function () {
+    static function (): void {
         // index:
         Route::get('', ['uses' => 'Category\IndexController@index', 'as' => 'index']);
 
@@ -321,7 +321,7 @@ Route::group(
 // Currency Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\TransactionCurrency', 'prefix' => 'currencies', 'as' => 'currencies.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'IndexController@index', 'as' => 'index']);
         Route::get('create', ['uses' => 'CreateController@create', 'as' => 'create']);
         Route::get('edit/{currency}', ['uses' => 'EditController@edit', 'as' => 'edit']);
@@ -336,7 +336,7 @@ Route::group(
 // Chart\Account Controller (default report).
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/account', 'as' => 'chart.account.'],
-    static function () {
+    static function (): void {
         Route::get('frontpage', ['uses' => 'AccountController@frontpage', 'as' => 'frontpage']);
         Route::get('expense', ['uses' => 'AccountController@expenseAccounts', 'as' => 'expense']);
         Route::get('revenue', ['uses' => 'AccountController@revenueAccounts', 'as' => 'revenue']);
@@ -371,7 +371,7 @@ Route::group(
 // Chart\Bill Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/bill', 'as' => 'chart.bill.'],
-    static function () {
+    static function (): void {
         Route::get('frontpage', ['uses' => 'BillController@frontpage', 'as' => 'frontpage']);
         Route::get('single/{bill}', ['uses' => 'BillController@single', 'as' => 'single']);
     }
@@ -380,7 +380,7 @@ Route::group(
 // Chart\Budget Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/budget', 'as' => 'chart.budget.'],
-    static function () {
+    static function (): void {
         Route::get('frontpage', ['uses' => 'BudgetController@frontpage', 'as' => 'frontpage']);
         Route::get('period/0/{currency}/{accountList}/{start_date}/{end_date}', ['uses' => 'BudgetController@periodNoBudget', 'as' => 'period.no-budget'])
             ->where(['start_date' => DATEFORMAT])
@@ -431,7 +431,7 @@ Route::group(
 // Chart\Category Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/category', 'as' => 'chart.category.'],
-    static function () {
+    static function (): void {
         Route::get('frontpage', ['uses' => 'CategoryController@frontPage', 'as' => 'frontpage']);
         Route::get('period/{category}', ['uses' => 'CategoryController@currentPeriod', 'as' => 'current']);
         Route::get('period/{category}/{date}', ['uses' => 'CategoryController@specificPeriod', 'as' => 'specific']);
@@ -501,7 +501,7 @@ Route::group(
 // Chart\Tag Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/tag', 'as' => 'chart.tag.'],
-    static function () {
+    static function (): void {
         Route::get('tag/expense/{accountList}/{tagList}/{start_date}/{end_date}', ['uses' => 'TagReportController@tagExpense', 'as' => 'tag-expense'])
             ->where(['start_date' => DATEFORMAT])
             ->where(['end_date' => DATEFORMAT])
@@ -565,7 +565,7 @@ Route::group(
 // Chart\Double Controller (for expense/revenue report).
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/double', 'as' => 'chart.double.'],
-    static function () {
+    static function (): void {
         Route::get('main/{accountList}/{account}/{start_date}/{end_date}', ['uses' => 'DoubleReportController@mainChart', 'as' => 'main'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -609,7 +609,7 @@ Route::group(
 // Chart\PiggyBank Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/piggy-bank', 'as' => 'chart.piggy-bank.'],
-    static function () {
+    static function (): void {
         Route::get('{piggyBank}', ['uses' => 'PiggyBankController@history', 'as' => 'history']);
     }
 );
@@ -617,7 +617,7 @@ Route::group(
 // Chart\Report Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/report', 'as' => 'chart.report.'],
-    static function () {
+    static function (): void {
         Route::get('operations/{accountList}/{start_date}/{end_date}', ['uses' => 'ReportController@operations', 'as' => 'operations'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -634,7 +634,7 @@ Route::group(
 // Chart\Transactions Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Chart', 'prefix' => 'chart/transactions', 'as' => 'chart.transactions.'],
-    static function () {
+    static function (): void {
         Route::get('categories/{objectType}/{start_date}/{end_date}', ['uses' => 'TransactionController@categories', 'as' => 'categories'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -660,7 +660,7 @@ Route::group(
 // Export controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'export', 'as' => 'export.'],
-    static function () {
+    static function (): void {
         // index
         Route::get('', ['uses' => 'Export\IndexController@index', 'as' => 'index']);
         Route::post('export', ['uses' => 'Export\IndexController@export', 'as' => 'export']);
@@ -669,7 +669,7 @@ Route::group(
 // Object group controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'groups', 'as' => 'object-groups.'],
-    static function () {
+    static function (): void {
         // index
         Route::get('', ['uses' => 'ObjectGroup\IndexController@index', 'as' => 'index']);
         Route::post('set-order/{objectGroup}', ['uses' => 'ObjectGroup\IndexController@setOrder', 'as' => 'set-order']);
@@ -687,7 +687,7 @@ Route::group(
 // JScript Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'v1/jscript', 'as' => 'javascript.'],
-    static function () {
+    static function (): void {
         Route::get('variables', ['uses' => 'JavascriptController@variables', 'as' => 'variables']);
         Route::get('accounts', ['uses' => 'JavascriptController@accounts', 'as' => 'accounts']);
         Route::get('currencies', ['uses' => 'JavascriptController@currencies', 'as' => 'currencies']);
@@ -697,7 +697,7 @@ Route::group(
 // JScript Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'v2/jscript', 'as' => 'javascript.v2.'],
-    static function () {
+    static function (): void {
         Route::get('variables', ['uses' => 'JavascriptController@variablesV2', 'as' => 'variables']);
     }
 );
@@ -705,7 +705,7 @@ Route::group(
 // JSON Controller(s).
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'json', 'as' => 'json.'],
-    static function () {
+    static function (): void {
         // budgets:
         Route::get(
             'budget/total-budgeted/{currency}/{start_date}/{end_date}',
@@ -738,7 +738,7 @@ Route::group(
 // NewUser Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'new-user', 'as' => 'new-user.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'NewUserController@index', 'as' => 'index']);
         Route::post('submit', ['uses' => 'NewUserController@submit', 'as' => 'submit']);
     }
@@ -747,7 +747,7 @@ Route::group(
 // Piggy Bank Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'piggy-banks', 'as' => 'piggy-banks.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'PiggyBank\IndexController@index', 'as' => 'index']);
         Route::get('add/{piggyBank}', ['uses' => 'PiggyBank\AmountController@add', 'as' => 'add-money']);
         Route::get('remove/{piggyBank}', ['uses' => 'PiggyBank\AmountController@remove', 'as' => 'remove-money']);
@@ -770,7 +770,7 @@ Route::group(
 // Preferences Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'preferences', 'as' => 'preferences.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'PreferencesController@index', 'as' => 'index']);
         Route::post('', ['uses' => 'PreferencesController@postIndex', 'as' => 'update']);
     }
@@ -779,7 +779,7 @@ Route::group(
 // Profile Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'profile', 'as' => 'profile.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ProfileController@index', 'as' => 'index']);
         Route::get('change-email', ['uses' => 'ProfileController@changeEmail', 'as' => 'change-email']);
         Route::get('change-password', ['uses' => 'ProfileController@changePassword', 'as' => 'change-password']);
@@ -805,7 +805,7 @@ Route::group(
 // Recurring Transactions Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'recurring', 'as' => 'recurring.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'Recurring\IndexController@index', 'as' => 'index']);
 
         Route::get('show/{recurrence}', ['uses' => 'Recurring\ShowController@show', 'as' => 'show']);
@@ -828,7 +828,7 @@ Route::group(
 // Report Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'reports', 'as' => 'reports.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'ReportController@index', 'as' => 'index']);
         Route::get('options/{reportType}', ['uses' => 'ReportController@options', 'as' => 'options']);
         Route::get('default/{accountList}/{start_date}/{end_date}', ['uses' => 'ReportController@defaultReport', 'as' => 'report.default']);
@@ -848,7 +848,7 @@ Route::group(
 // Report Data AccountController.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Report', 'prefix' => 'report-data/account', 'as' => 'report-data.account.'],
-    static function () {
+    static function (): void {
         Route::get('general/{accountList}/{start_date}/{end_date}', ['uses' => 'AccountController@general', 'as' => 'general'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -860,7 +860,7 @@ Route::group(
 // Report Data Bill Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Report', 'prefix' => 'report-data/bill', 'as' => 'report-data.bills.'],
-    static function () {
+    static function (): void {
         Route::get('overview/{accountList}/{start_date}/{end_date}', ['uses' => 'BillController@overview', 'as' => 'overview'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -872,7 +872,7 @@ Route::group(
 // Report Double Data Expense / Revenue Account Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Report', 'prefix' => 'report-data/double', 'as' => 'report-data.double.'],
-    static function () {
+    static function (): void {
         // spent + earned per combination.
         Route::get('operations/{accountList}/{doubleList}/{start_date}/{end_date}', ['uses' => 'DoubleController@operations', 'as' => 'operations'])->where(
             ['start_date' => DATEFORMAT]
@@ -920,7 +920,7 @@ Route::group(
         'prefix'     => 'report-data/operations',
         'as'         => 'report-data.operations.',
     ],
-    static function () {
+    static function (): void {
         Route::get('operations/{accountList}/{start_date}/{end_date}', ['uses' => 'OperationsController@operations', 'as' => 'operations'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -947,7 +947,7 @@ Route::group(
         'prefix'     => 'report-data/category',
         'as'         => 'report-data.category.',
     ],
-    static function () {
+    static function (): void {
         // TODO three routes still in use?
         Route::get('operations/{accountList}/{start_date}/{end_date}', ['uses' => 'CategoryController@operations', 'as' => 'operations'])->where(
             ['start_date' => DATEFORMAT]
@@ -1016,7 +1016,7 @@ Route::group(
         'prefix'     => 'report-data/tag',
         'as'         => 'report-data.tag.',
     ],
-    static function () {
+    static function (): void {
         Route::get('accounts/{accountList}/{tagList}/{start_date}/{end_date}', ['uses' => 'TagController@accounts', 'as' => 'accounts'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -1061,7 +1061,7 @@ Route::group(
 // Report Data Balance Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Report', 'prefix' => 'report-data/balance', 'as' => 'report-data.balance.'],
-    static function () {
+    static function (): void {
         Route::get('general/{accountList}/{start_date}/{end_date}', ['uses' => 'BalanceController@general', 'as' => 'general'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -1073,7 +1073,7 @@ Route::group(
 // Report Data Budget Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Report', 'prefix' => 'report-data/budget', 'as' => 'report-data.budget.'],
-    static function () {
+    static function (): void {
         Route::get('general/{accountList}/{start_date}/{end_date}/', ['uses' => 'BudgetController@general', 'as' => 'general'])->where(
             ['start_date' => DATEFORMAT]
         )
@@ -1118,7 +1118,7 @@ Route::group(
 // Rules Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'rules', 'as' => 'rules.'],
-    static function () {
+    static function (): void {
         // create controller
         Route::get('create/{ruleGroup?}', ['uses' => 'Rule\CreateController@create', 'as' => 'create']);
         Route::get('create-from-bill/{bill}', ['uses' => 'Rule\CreateController@createFromBill', 'as' => 'create-from-bill']);
@@ -1150,7 +1150,7 @@ Route::group(
 // Rule Groups Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'rule-groups', 'as' => 'rule-groups.'],
-    static function () {
+    static function (): void {
         Route::get('create', ['uses' => 'RuleGroup\CreateController@create', 'as' => 'create']);
         Route::get('edit/{ruleGroup}', ['uses' => 'RuleGroup\EditController@edit', 'as' => 'edit']);
         Route::get('delete/{ruleGroup}', ['uses' => 'RuleGroup\DeleteController@delete', 'as' => 'delete']);
@@ -1169,7 +1169,7 @@ Route::group(
 // Search Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'search', 'as' => 'search.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'SearchController@index', 'as' => 'index']);
         Route::any('search', ['uses' => 'SearchController@search', 'as' => 'search']);
     }
@@ -1178,7 +1178,7 @@ Route::group(
 // Tag Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'tags', 'as' => 'tags.'],
-    static function () {
+    static function (): void {
         Route::get('', ['uses' => 'TagController@index', 'as' => 'index']);
         Route::get('create', ['uses' => 'TagController@create', 'as' => 'create']);
 
@@ -1200,7 +1200,7 @@ Route::group(
 // Transaction Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers', 'prefix' => 'transactions', 'as' => 'transactions.'],
-    static function () {
+    static function (): void {
         // show groups:
         // TODO improve these routes
         Route::get('{what}/all', ['uses' => 'Transaction\IndexController@indexAll', 'as' => 'index.all'])->where(
@@ -1239,7 +1239,7 @@ Route::group(
 // Transaction Mass Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Transaction', 'prefix' => 'transactions/mass', 'as' => 'transactions.mass.'],
-    static function () {
+    static function (): void {
         Route::get('edit/{journalList}', ['uses' => 'MassController@edit', 'as' => 'edit']);
         Route::get('delete/{journalList}', ['uses' => 'MassController@delete', 'as' => 'delete']);
         Route::post('update', ['uses' => 'MassController@update', 'as' => 'update']);
@@ -1250,7 +1250,7 @@ Route::group(
 // Transaction Bulk Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Transaction', 'prefix' => 'transactions/bulk', 'as' => 'transactions.bulk.'],
-    static function () {
+    static function (): void {
         Route::get('edit/{journalList}', ['uses' => 'BulkController@edit', 'as' => 'edit']);
         Route::post('update', ['uses' => 'BulkController@update', 'as' => 'update']);
     }
@@ -1264,7 +1264,7 @@ Route::group(
         'prefix'     => 'transactions/convert',
         'as'         => 'transactions.convert.',
     ],
-    static function () {
+    static function (): void {
         Route::get('{transactionType}/{transactionGroup}', ['uses' => 'ConvertController@index', 'as' => 'index']);
         Route::post('{transactionType}/{transactionGroup}', ['uses' => 'ConvertController@postIndex', 'as' => 'index.post']);
     }
@@ -1273,7 +1273,7 @@ Route::group(
 // Transaction Link Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Transaction', 'prefix' => 'transactions/link', 'as' => 'transactions.link.'],
-    static function () {
+    static function (): void {
         Route::get('modal/{tj}', ['uses' => 'LinkController@modal', 'as' => 'modal']);
 
         // TODO improve this route
@@ -1287,7 +1287,7 @@ Route::group(
 // Report Popup Controller.
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Popup', 'prefix' => 'popup', 'as' => 'popup.'],
-    static function () {
+    static function (): void {
         Route::get('general', ['uses' => 'ReportController@general', 'as' => 'general']);
     }
 );
@@ -1295,7 +1295,7 @@ Route::group(
 // Webhooks management
 Route::group(
     ['middleware' => 'user-full-auth', 'namespace' => 'FireflyIII\Http\Controllers\Webhooks', 'prefix' => 'webhooks', 'as' => 'webhooks.'],
-    static function () {
+    static function (): void {
         Route::get('index', ['uses' => 'IndexController@index', 'as' => 'index']);
         Route::get('create', ['uses' => 'CreateController@index', 'as' => 'create']);
         Route::get('edit/{webhook}', ['uses' => 'EditController@index', 'as' => 'edit']);
@@ -1307,7 +1307,7 @@ Route::group(
 // For the admin routes, the user must be logged in and have the role of 'owner'.
 Route::group(
     ['middleware' => 'admin', 'namespace' => 'FireflyIII\Http\Controllers\Admin', 'prefix' => 'admin', 'as' => 'admin.'],
-    static function () {
+    static function (): void {
         // admin home
         Route::get('', ['uses' => 'HomeController@index', 'as' => 'index']);
         Route::post('test-message', ['uses' => 'HomeController@testMessage', 'as' => 'test-message']);
diff --git a/tests/integration/Support/NavigationCustomEndOfPeriodTest.php b/tests/integration/Support/NavigationCustomEndOfPeriodTest.php
index 7dfbb974de..7feba5061a 100644
--- a/tests/integration/Support/NavigationCustomEndOfPeriodTest.php
+++ b/tests/integration/Support/NavigationCustomEndOfPeriodTest.php
@@ -38,7 +38,7 @@ final class NavigationCustomEndOfPeriodTest extends TestCase
     /**
      * @preserveGlobalState disabled
      */
-    public function testGivenADateAndCustomFrequencyWhenCalculateTheDateThenReturnsTheEndOfMonthSuccessful()
+    public function testGivenADateAndCustomFrequencyWhenCalculateTheDateThenReturnsTheEndOfMonthSuccessful(): void
     {
         $from       = Carbon::parse('2023-08-05');
         $expected   = Carbon::parse('2023-09-04');
diff --git a/tests/unit/Support/Calendar/CalculatorTest.php b/tests/unit/Support/Calendar/CalculatorTest.php
index 711eaee1f6..ed9f1537c3 100644
--- a/tests/unit/Support/Calendar/CalculatorTest.php
+++ b/tests/unit/Support/Calendar/CalculatorTest.php
@@ -78,7 +78,7 @@ final class CalculatorTest extends TestCase
      *
      * @throws IntervalException
      */
-    public function testGivenADailyPeriodicityWhenCallTheNextDateByIntervalMethodThenReturnsTheExpectedDateSuccessful(CalculatorProvider $provider)
+    public function testGivenADailyPeriodicityWhenCallTheNextDateByIntervalMethodThenReturnsTheExpectedDateSuccessful(CalculatorProvider $provider): void
     {
         $calculator = new Calculator();
         $period     = $calculator->nextDateByInterval($provider->epoch(), $provider->periodicity);
@@ -90,7 +90,7 @@ final class CalculatorTest extends TestCase
      *
      * @throws IntervalException
      */
-    public function testGivenAnEpochWithSkipIntervalNumberWhenCallTheNextDateBySkippedIntervalMethodThenReturnsTheExpectedDateSuccessful(CalculatorProvider $provider)
+    public function testGivenAnEpochWithSkipIntervalNumberWhenCallTheNextDateBySkippedIntervalMethodThenReturnsTheExpectedDateSuccessful(CalculatorProvider $provider): void
     {
         $calculator = new Calculator();
         $period     = $calculator->nextDateByInterval($provider->epoch(), $provider->periodicity, $provider->skip);
diff --git a/tests/unit/Support/NavigationAddPeriodTest.php b/tests/unit/Support/NavigationAddPeriodTest.php
index bd91acf40b..70bce9defc 100644
--- a/tests/unit/Support/NavigationAddPeriodTest.php
+++ b/tests/unit/Support/NavigationAddPeriodTest.php
@@ -166,7 +166,7 @@ final class NavigationAddPeriodTest extends TestCase
     /**
      * @dataProvider providePeriodsWithSkippingParam
      */
-    public function testGivenAFrequencyAndSkipIntervalWhenCalculateTheDateThenReturnsTheSkippedDateSuccessful(int $skip, string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenAFrequencyAndSkipIntervalWhenCalculateTheDateThenReturnsTheSkippedDateSuccessful(int $skip, string $frequency, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->addPeriod($from, $frequency, $skip);
         self::assertSame($expected->toDateString(), $period->toDateString());
@@ -175,7 +175,7 @@ final class NavigationAddPeriodTest extends TestCase
     /**
      * @dataProvider providePeriods
      */
-    public function testGivenAFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenAFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->addPeriod($from, $frequency, 0);
         self::assertSame($expected->toDateString(), $period->toDateString());
@@ -184,7 +184,7 @@ final class NavigationAddPeriodTest extends TestCase
     /**
      * @dataProvider provideFrequencies
      */
-    public function testGivenAIntervalWhenCallTheNextDateByIntervalMethodThenReturnsTheExpectedDateSuccessful(Periodicity $periodicity, Carbon $from, Carbon $expected)
+    public function testGivenAIntervalWhenCallTheNextDateByIntervalMethodThenReturnsTheExpectedDateSuccessful(Periodicity $periodicity, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->nextDateByInterval($from, $periodicity);
         self::assertSame($expected->toDateString(), $period->toDateString());
@@ -193,7 +193,7 @@ final class NavigationAddPeriodTest extends TestCase
     /**
      * @dataProvider provideMonthPeriods
      */
-    public function testGivenAMonthFrequencyWhenCalculateTheDateThenReturnsTheLastDayOfMonthSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenAMonthFrequencyWhenCalculateTheDateThenReturnsTheLastDayOfMonthSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->addPeriod($from, $frequency, 0);
         self::assertSame($expected->toDateString(), $period->toDateString());
diff --git a/tests/unit/Support/NavigationEndOfPeriodTest.php b/tests/unit/Support/NavigationEndOfPeriodTest.php
index 0474c981a5..0666106b21 100644
--- a/tests/unit/Support/NavigationEndOfPeriodTest.php
+++ b/tests/unit/Support/NavigationEndOfPeriodTest.php
@@ -80,7 +80,7 @@ final class NavigationEndOfPeriodTest extends TestCase
     /**
      * @dataProvider provideDates
      */
-    public function testGivenADateAndFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenADateAndFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->endOfPeriod($from, $frequency);
         self::assertSame($expected->toDateString(), $period->toDateString());
@@ -98,7 +98,7 @@ final class NavigationEndOfPeriodTest extends TestCase
     /**
      * @dataProvider provideUnknownFrequencies
      */
-    public function testGivenADateAndUnknownFrequencyWhenCalculateTheDateThenReturnsTheSameDateSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenADateAndUnknownFrequencyWhenCalculateTheDateThenReturnsTheSameDateSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         Log::spy();
 
diff --git a/tests/unit/Support/NavigationPreferredCarbonFormatByPeriodTest.php b/tests/unit/Support/NavigationPreferredCarbonFormatByPeriodTest.php
index 9ecb8af6b6..986644aab1 100644
--- a/tests/unit/Support/NavigationPreferredCarbonFormatByPeriodTest.php
+++ b/tests/unit/Support/NavigationPreferredCarbonFormatByPeriodTest.php
@@ -61,7 +61,7 @@ final class NavigationPreferredCarbonFormatByPeriodTest extends TestCase
     /**
      * @dataProvider providePeriods
      */
-    public function testGivenAPeriodWhenCallPreferredCarbonFormatByPeriodThenReturnsExpectedFormat(string $period, string $expected)
+    public function testGivenAPeriodWhenCallPreferredCarbonFormatByPeriodThenReturnsExpectedFormat(string $period, string $expected): void
     {
         $formatPeriod = $this->navigation->preferredCarbonFormatByPeriod($period);
         self::assertSame($expected, $formatPeriod);
diff --git a/tests/unit/Support/NavigationPreferredCarbonFormatTest.php b/tests/unit/Support/NavigationPreferredCarbonFormatTest.php
index 099fe70342..304d6b9bbf 100644
--- a/tests/unit/Support/NavigationPreferredCarbonFormatTest.php
+++ b/tests/unit/Support/NavigationPreferredCarbonFormatTest.php
@@ -68,7 +68,7 @@ final class NavigationPreferredCarbonFormatTest extends TestCase
     /**
      * @dataProvider providePeriods
      */
-    public function testGivenStartAndEndDatesWhenCallPreferredCarbonFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected)
+    public function testGivenStartAndEndDatesWhenCallPreferredCarbonFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected): void
     {
         $carbonFormat = $this->navigation->preferredCarbonFormat($start, $end);
         self::assertSame($expected, $carbonFormat);
diff --git a/tests/unit/Support/NavigationPreferredEndOfPeriodTest.php b/tests/unit/Support/NavigationPreferredEndOfPeriodTest.php
index f0c937699b..54e8eb132c 100644
--- a/tests/unit/Support/NavigationPreferredEndOfPeriodTest.php
+++ b/tests/unit/Support/NavigationPreferredEndOfPeriodTest.php
@@ -68,7 +68,7 @@ final class NavigationPreferredEndOfPeriodTest extends TestCase
     /**
      * @dataProvider providePeriods
      */
-    public function testGivenStartAndEndDatesWhenCallPreferredEndOfPeriodThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected)
+    public function testGivenStartAndEndDatesWhenCallPreferredEndOfPeriodThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected): void
     {
         $formatPeriod = $this->navigation->preferredEndOfPeriod($start, $end);
         self::assertSame($expected, $formatPeriod);
diff --git a/tests/unit/Support/NavigationPreferredRangeFormatTest.php b/tests/unit/Support/NavigationPreferredRangeFormatTest.php
index e6ac727a16..3d328e8e5c 100644
--- a/tests/unit/Support/NavigationPreferredRangeFormatTest.php
+++ b/tests/unit/Support/NavigationPreferredRangeFormatTest.php
@@ -68,7 +68,7 @@ final class NavigationPreferredRangeFormatTest extends TestCase
     /**
      * @dataProvider providePeriods
      */
-    public function testGivenStartAndEndDatesWhenCallPreferredRangeFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected)
+    public function testGivenStartAndEndDatesWhenCallPreferredRangeFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected): void
     {
         $formatPeriod = $this->navigation->preferredRangeFormat($start, $end);
         self::assertSame($expected, $formatPeriod);
diff --git a/tests/unit/Support/NavigationPreferredSqlFormatTest.php b/tests/unit/Support/NavigationPreferredSqlFormatTest.php
index 3b2ac677e7..6e1d1eac32 100644
--- a/tests/unit/Support/NavigationPreferredSqlFormatTest.php
+++ b/tests/unit/Support/NavigationPreferredSqlFormatTest.php
@@ -68,7 +68,7 @@ final class NavigationPreferredSqlFormatTest extends TestCase
     /**
      * @dataProvider provideDates
      */
-    public function testGivenStartAndEndDatesWhenCallPreferredSqlFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected)
+    public function testGivenStartAndEndDatesWhenCallPreferredSqlFormatThenReturnsTheExpectedFormatSuccessful(Carbon $start, Carbon $end, string $expected): void
     {
         $formatPeriod = $this->navigation->preferredSqlFormat($start, $end);
         self::assertSame($expected, $formatPeriod);
diff --git a/tests/unit/Support/NavigationStartOfPeriodTest.php b/tests/unit/Support/NavigationStartOfPeriodTest.php
index 9bc3bf3e85..f2e2528742 100644
--- a/tests/unit/Support/NavigationStartOfPeriodTest.php
+++ b/tests/unit/Support/NavigationStartOfPeriodTest.php
@@ -90,7 +90,7 @@ final class NavigationStartOfPeriodTest extends TestCase
     /**
      * @dataProvider provideDates
      */
-    public function testGivenADateAndFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenADateAndFrequencyWhenCalculateTheDateThenReturnsTheExpectedDateSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         $period = $this->navigation->startOfPeriod($from, $frequency);
         self::assertSame($expected->toDateString(), $period->toDateString());
@@ -99,7 +99,7 @@ final class NavigationStartOfPeriodTest extends TestCase
     /**
      * @dataProvider provideUnknownFrequencies
      */
-    public function testGivenADateAndUnknownFrequencyWhenCalculateTheDateThenReturnsTheSameDateSuccessful(string $frequency, Carbon $from, Carbon $expected)
+    public function testGivenADateAndUnknownFrequencyWhenCalculateTheDateThenReturnsTheSameDateSuccessful(string $frequency, Carbon $from, Carbon $expected): void
     {
         Log::shouldReceive('error')
             ->with(sprintf('Cannot do startOfPeriod for $repeat_freq "%s"', $frequency))