diff --git a/src/ext/updater/class.controller.php b/src/ext/updater/class.controller.php
index 35c51f9..b5a038b 100644
--- a/src/ext/updater/class.controller.php
+++ b/src/ext/updater/class.controller.php
@@ -53,6 +53,7 @@ class Controller extends \ApiController
 
         // TODO: need to run post-update by new version
         // ...
+        // remove /includes/lang/cns.json   #renamed to zh-cn.jpon
 
         $prefs['version'] = '';
         $prefs['download'] = '';
diff --git a/src/includes/lang/cns.json b/src/includes/lang/zh-cn.json
similarity index 100%
rename from src/includes/lang/cns.json
rename to src/includes/lang/zh-cn.json