diff --git a/Gruntfile.js b/Gruntfile.js
index c22f633b57..440c43a943 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -17,7 +17,7 @@
  * To generate the now existing package.json:
  *		npm init
  *		npm install grunt --save-dev
- *		npm install grunt-contrib-uglify --save-dev
+ *		npm install grunt-contrib-uglify-es --save-dev
  *		npm install grunt-newer --save-dev
  *		npm install grunt-contrib-cssmin --save-dev
  *		npm install grunt-hub --save-dev
@@ -426,7 +426,7 @@ module.exports = function (grunt) {
 		}
 	});
 	// Load the plugin that provides the "uglify" task.
-	grunt.loadNpmTasks('grunt-contrib-uglify');
+	grunt.loadNpmTasks('grunt-contrib-uglify-es');
 
 	// Load plugin for css minificaton
 	grunt.loadNpmTasks('grunt-contrib-cssmin');
diff --git a/package.json b/package.json
index 1aa10146e4..2fe92887b9 100644
--- a/package.json
+++ b/package.json
@@ -6,10 +6,11 @@
   "dependencies": {},
   "repository": {},
   "devDependencies": {
-    "grunt": "^1.0.1",
+    "grunt": "^1.0.3",
     "grunt-contrib-cssmin": "^2.2.1",
     "grunt-contrib-uglify": "^3.1.0",
+    "grunt-contrib-uglify-es": "^3.3.0",
     "grunt-hub": "^0.7.0",
-    "grunt-newer": "^1.2.0"
+    "grunt-newer": "^1.3.0"
   }
 }