diff --git a/app/Factory/BillFactory.php b/app/Factory/BillFactory.php
index 24aa6a7e7e..8504e8b4bd 100644
--- a/app/Factory/BillFactory.php
+++ b/app/Factory/BillFactory.php
@@ -55,6 +55,9 @@ class BillFactory
             $skip   = array_key_exists('skip', $data) ? $data['skip'] : 0;
             $active = array_key_exists('active', $data) ? $data['active'] : 0;
 
+            $data['extension_date'] = $data['extension_date'] ?? null;
+            $data['end_date']       = $data['end_date'] ?? null;
+
             /** @var Bill $bill */
             $bill   = Bill::create(
                 [