diff --git a/demo/demo.js b/demo/demo.js
index 55a75c8..1a8e015 100644
--- a/demo/demo.js
+++ b/demo/demo.js
@@ -19,7 +19,7 @@ var cos = new COS({
     Proxy: '',
     Protocol: 'https:',
     FollowRedirect: false,
-    });
+});
 
 var TaskId;