diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index 1ab58c019da..7ba063f8f79 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -165,7 +165,7 @@ class Conf
 							$varname = $partname.'_modules';  // TODO deprecated
 							if (! is_array($this->$varname)) { $this->$varname = array(); } // TODO deprecated
 							if (! is_array($this->modules_parts[$partname])) { $this->modules_parts[$partname] = array(); }
-							$arrValue = @unserialize($value);
+							$arrValue = dol_json_decode($value,true);
 							if (is_array($arrValue) && ! empty($arrValue)) $value = $arrValue;
 							else if (in_array($partname,array('login','menus','triggers'))) $value = '/'.$modulename.'/core/'.$partname.'/';
 							else if (in_array($partname,array('models'))) $value = '/'.$modulename.'/';
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 33d3961ce74..de0358270bd 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -145,6 +145,32 @@ if (! function_exists('json_decode'))
 	}
 }
 
+/**
+ * 	Function that encodes data in json format
+ * 
+ * 	@param	mixed	$elements	PHP object to json encode
+ * 	@return	string				Json encoded string
+ */
+function dol_json_encode($elements)
+{
+	return json_encode($elements);
+}
+
+/**
+ * 	Function that decodes data from json format
+ *
+ * 	@param	string	$json		Json encoded to PHP Object or Array
+ * 	@param	bool	$assoc		False return an object, true return an array
+ * 	@return mixed				Object or Array
+ */
+function dol_json_decode($json, $assoc=false)
+{
+	$out='';
+	$out = unserialize($json); // For compatibility, test if serialized
+	if (empty($out)) $out = json_decode($json, $assoc);
+	return $out;
+}
+
 /**
  * Function to return value of a static property when class
  * name is dynamically defined (not hard coded).
diff --git a/htdocs/core/modules/DolibarrModules.class.php b/htdocs/core/modules/DolibarrModules.class.php
index ffb90f0ec9a..9773e518896 100644
--- a/htdocs/core/modules/DolibarrModules.class.php
+++ b/htdocs/core/modules/DolibarrModules.class.php
@@ -1277,12 +1277,12 @@ abstract class DolibarrModules
     				// Can defined other parameters
     				if (is_array($value['data']) && ! empty($value['data']))
     				{
-    					$newvalue = serialize($value['data']);
+    					$newvalue = dol_json_encode($value['data']);
     					if (isset($value['entity'])) $entity = $value['entity'];
     				}
     				else
     				{
-    					$newvalue = serialize($value);
+    					$newvalue = dol_json_encode($value);
     				}
     			}