diff --git a/package.json b/package.json
index 8ecff176..155d4458 100644
--- a/package.json
+++ b/package.json
@@ -55,14 +55,14 @@
   ],
   "devDependencies": {
     "grunt": "^1.0.3",
-    "grunt-cli": "^1.3.1",
-    "grunt-contrib-clean": "^1.1.0",
+    "grunt-cli": "^1.3.2",
+    "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-concat": "^1.0.1",
     "grunt-contrib-copy": "^1.0.0",
-    "grunt-contrib-cssmin": "^2.2.1",
-    "grunt-contrib-jshint": "^1.1.0",
+    "grunt-contrib-cssmin": "^3.0.0",
+    "grunt-contrib-jshint": "^2.0.0",
     "grunt-contrib-qunit": "^3.0.1",
-    "grunt-contrib-uglify": "^3.4.0",
+    "grunt-contrib-uglify": "^4.0.0",
     "grunt-contrib-watch": "^1.1.0",
     "grunt-htmlhint": "^0.9.13",
     "grunt-jscs": "^3.0.1",