diff --git a/webapp/controller/RankController.class.php b/webapp/controller/RankController.class.php
index ad87e1b..db371df 100644
--- a/webapp/controller/RankController.class.php
+++ b/webapp/controller/RankController.class.php
@@ -130,6 +130,7 @@ class RankController{
     {
         $i = 0;
         $user_list = array();
+        $myavatar_url = json_decode($myavatar_url);
         foreach ($user_db as $user) {
             $name = '';
             $avatar_url = '';