diff --git a/Models/Module.php b/Models/Module.php
index 8d62a7f..d3515a2 100644
--- a/Models/Module.php
+++ b/Models/Module.php
@@ -189,7 +189,7 @@ class Module
      */
     public function __toString()
     {
-        return \json_encode($this->toArray());
+        return (string) \json_encode($this->toArray());
     }
 
     /**