diff --git a/.jshintrc b/.jshintrc
index 2c40c44..8c86fc7 100644
--- a/.jshintrc
+++ b/.jshintrc
@@ -10,6 +10,5 @@
   "unused": true,
   "boss": true,
   "eqnull": true,
-  "node": true,
-  "es5": true
+  "node": true
 }
diff --git a/package.json b/package.json
index 0bd9793..85c7be8 100644
--- a/package.json
+++ b/package.json
@@ -28,10 +28,10 @@
     "test": "grunt nodeunit"
   },
   "devDependencies": {
-    "grunt-contrib-jshint": "~0.1.1",
-    "grunt-contrib-nodeunit": "~0.1.2",
-    "grunt-contrib-watch": "~0.2.0",
-    "grunt": "~0.4.1"
+    "grunt-contrib-jshint": "~0.11.0",
+    "grunt-contrib-nodeunit": "~0.4.1",
+    "grunt-contrib-watch": "~0.6.1",
+    "grunt": "~0.4.5"
   },
   "keywords": []
 }
\ No newline at end of file