Update package.json

Author: FoxUSA

package.json

@@ -18,7 +18,8 @@
     "karma-firefox-launcher": "^0.1.3",
     "grunt-shell": "^0.7.0",
     "es5-shim": "4.1.1",
-    "grunt-manifest": "^0.4.0"
+    "grunt-manifest": "^0.4.0",
+    "grunt": "^0.4.5"
   },
   "scripts": {
     "test": "grunt ci"