diff --git a/scripts/HelloWorld.js b/scripts/HelloWorld.js
index 2a895a54e8..537fc3744e 100644
--- a/scripts/HelloWorld.js
+++ b/scripts/HelloWorld.js
@@ -6,8 +6,8 @@
     - Express.js (built-in, https://www.npmjs.com/package/express)
 */
 
-var express = require('express');
-var router = express.Router();
+const  express = require('express');
+const  router = express.Router();
 
 
 router.get('/', function(req, res, next) {