diff --git a/package.json b/package.json
index 6e4e164..596bcdb 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   },
   "homepage": "http://github.com/nghuuphuoc/responsivetest",
   "devDependencies": {
-    "grunt": "~0.4.1",
+    "grunt": "~1.6.2",
     "grunt-contrib-cssmin": "~0.6.2",
     "grunt-contrib-copy": "~0.4.1",
     "grunt-contrib-uglify": "~0.2.4",