diff --git a/js/loader.js b/js/loader.js
index 4ba75578..91a17329 100644
--- a/js/loader.js
+++ b/js/loader.js
@@ -98,6 +98,7 @@ var Loader = (function () {
 				file: moduleName + ".js",
 				position: moduleData.position,
 				header: moduleData.header,
+				configDeepMerge: typeof moduleData.configDeepMerge === "boolean" ? moduleData.configDeepMerge : false,
 				config: moduleData.config,
 				classes: typeof moduleData.classes !== "undefined" ? moduleData.classes + " " + module : module
 			});
diff --git a/js/module.js b/js/module.js
index 8bb5990e..40f9b311 100644
--- a/js/module.js
+++ b/js/module.js
@@ -221,16 +221,17 @@ var Module = Class.extend({
 		this.identifier = data.identifier;
 		this.hidden = false;
 
-		this.setConfig(data.config);
+		this.setConfig(data.config, data.configDeepMerge);
 	},
 
 	/**
 	 * Set the module config and combine it with the module defaults.
 	 *
 	 * @param {object} config The combined module config.
+	 * @param {boolean} config Merge module config in deep.
 	 */
-	setConfig: function (config) {
-		this.config = Object.assign({}, this.defaults, config);
+	setConfig: function (config, deep) {
+		this.config = deep ? configMerge({}, this.defaults, config) : Object.assign({}, this.defaults, config);
 	},
 
 	/**
@@ -440,6 +441,48 @@ var Module = Class.extend({
 	}
 });
 
+/** Merging MagicMirror (or other) default/config script
+ * merge 2 objects or/with array
+ * using:
+ * -------
+ * this.config = configMerge({}, this.defaults, this.config)
+ * -------
+ * arg1: initial objet
+ * arg2: config model
+ * arg3: config to merge
+ * -------
+ * why using it ?
+ * Object.assign() function don't to all job
+ * it don't merge all thing in deep
+ * -> object in object and array is not merging
+ * -------
+ * @bugsounet
+ * @Todo: idea of Mich determinate what do you want to merge or not
+ */
+
+function configMerge(result) {
+	var stack = Array.prototype.slice.call(arguments, 1);
+	var item;
+	var key;
+	while (stack.length) {
+		item = stack.shift();
+		for (key in item) {
+			if (item.hasOwnProperty(key)) {
+				if (typeof result[key] === "object" && result[key] && Object.prototype.toString.call(result[key]) !== "[object Array]") {
+					if (typeof item[key] === "object" && item[key] !== null) {
+						result[key] = configMerge({}, result[key], item[key]);
+					} else {
+						result[key] = item[key];
+					}
+				} else {
+					result[key] = item[key];
+				}
+			}
+		}
+	}
+	return result;
+}
+
 Module.definitions = {};
 
 Module.create = function (name) {