diff --git a/src/Kunstmaan/AdminBundle/Entity/BaseUser.php b/src/Kunstmaan/AdminBundle/Entity/BaseUser.php
index cbc4b35c3c..3a1497b71a 100644
--- a/src/Kunstmaan/AdminBundle/Entity/BaseUser.php
+++ b/src/Kunstmaan/AdminBundle/Entity/BaseUser.php
@@ -165,6 +165,19 @@ public static function loadValidatorMetadata(ClassMetadata $metadata)
         )));
     }
 
-    abstract protected function getFormTypeClass();
-    abstract protected function getAdminListConfiguratorClass();
+    /**
+     * Return class name of form type used to add & edit users
+     *
+     * @return string
+     */
+    abstract public function getFormTypeClass();
+
+    /**
+     * Return class name of admin list configurator used for users
+     *
+     * @return string
+     *
+     * @deprecated Use the kunstmaan_user_management.user_admin_list_configurator.class parameter instead!
+     */
+    abstract public function getAdminListConfiguratorClass();
 }
diff --git a/src/Kunstmaan/AdminBundle/composer.json b/src/Kunstmaan/AdminBundle/composer.json
index 2813a254b2..48869f870d 100644
--- a/src/Kunstmaan/AdminBundle/composer.json
+++ b/src/Kunstmaan/AdminBundle/composer.json
@@ -14,7 +14,7 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "symfony/symfony": "~2.3",
+        "symfony/symfony": "~2.5,<2.7",
         "doctrine/orm": "~2.2,>=2.2.3",
         "friendsofsymfony/user-bundle": "2.0.*@dev",
         "knplabs/knp-menu-bundle": "~2.0",