diff --git a/Controller/KindController.php b/Controller/KindController.php
index fb744ac..73a195b 100644
--- a/Controller/KindController.php
+++ b/Controller/KindController.php
@@ -48,7 +48,7 @@ class KindController
     {
         $result = $this->db->deleteKind($kindId);
 
-        return $result;
+        return json_encode($result);
     }
 
 }