diff --git a/.jshintrc b/.jshintrc
index 1b7387f4a2..20dadcd1fa 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -3,7 +3,7 @@
 	"curly": true,
 	"eqeqeq": true,
 	"eqnull": true,
-	"es3": true,
+	"esversion": 3,
 	"expr": true,
 	"immed": true,
 	"noarg": true,
diff --git a/Gruntfile.js b/Gruntfile.js
index d93a3c331e..8b14962152 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -1,4 +1,5 @@
 /* jshint node:true */
+/* jshint esversion: 6 */
 /* globals Set */
 var webpackConfig = require( './webpack.config' );