--- a/cms/app-client/ember-cli-build.js	Fri Sep 08 12:04:21 2017 +0200
+++ b/cms/app-client/ember-cli-build.js	Fri Sep 08 15:03:29 2017 +0200
@@ -2,7 +2,7 @@
 const EmberApp = require('ember-cli/lib/broccoli/ember-app');
 
 module.exports = function(defaults) {
-    var app = new EmberApp(defaults, {
+    let app = new EmberApp(defaults, {
         // Add options here
         'ember-cli-babel': {
           includePolyfill: true,