diff --git a/package.json b/package.json
index 9842b8e3..13e5f563 100644
--- a/package.json
+++ b/package.json
@@ -14,14 +14,14 @@
     "url": "http://github.com/xeolabs/scenejs.git"
   },
   "devDependencies": {
-    "grunt": "~0.4.5",
-    "grunt-contrib-concat": "~0.5.1",
-    "grunt-contrib-uglify": "~0.9.1",
-    "grunt-contrib-yuidoc": "~0.7.0",
-    "grunt-contrib-jshint": "~0.11.2",
-    "grunt-contrib-clean": "~0.6.0",
-    "grunt-contrib-copy": "~0.8.0",
-    "grunt-contrib-watch": "~0.6.1"
+    "grunt": "^0.4.5",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-concat": "^0.5.1",
+    "grunt-contrib-copy": "^0.8.2",
+    "grunt-contrib-jshint": "^0.11.3",
+    "grunt-contrib-uglify": "^0.9.2",
+    "grunt-contrib-watch": "^0.6.1",
+    "grunt-contrib-yuidoc": "~0.7.0"
   },
   "engines": {
     "node": ">=0.10.17",