diff --git a/package.json b/package.json
index d85085b..57d5861 100644
--- a/package.json
+++ b/package.json
@@ -11,13 +11,13 @@
     "url": "http://github.com/thinkpixellab/PxMap.git"
   },
   "dependencies": {
-    "grunt": "~0.4.1",
-    "grunt-contrib-clean": "^0.4.1",
-    "grunt-contrib-concat": "^0.1.3",
-    "grunt-contrib-copy": "^0.4.1",
-    "grunt-contrib-jshint": "^0.2.0",
-    "grunt-contrib-uglify": "^0.1.2",
-    "grunt-contrib-watch": "^0.3.1"
+    "grunt": "~0.4.5",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-concat": "^0.5.0",
+    "grunt-contrib-copy": "^0.6.0",
+    "grunt-contrib-jshint": "^0.10.0",
+    "grunt-contrib-uglify": "^0.6.0",
+    "grunt-contrib-watch": "^0.6.1"
   },
   "devDependencies": {},
   "keywords": []