diff --git a/Helper/Config.php b/Helper/Config.php
index a733cdd..432bba7 100644
--- a/Helper/Config.php
+++ b/Helper/Config.php
@@ -7,4 +7,8 @@
 class Config extends CoreConfig
 {
     const XML_CONFIG_GROUP = 'checkin';
+
+    protected $moduleDependencies = [
+        'PayEx_Client'
+    ];
 }