diff --git a/package.json b/package.json
index 82031d6..316bf0f 100644
--- a/package.json
+++ b/package.json
@@ -46,13 +46,13 @@
     "csscomb": "~3.1.0"
   },
   "devDependencies": {
-    "grunt": "^0.4.5",
-    "grunt-contrib-clean": "^0.6.0",
-    "grunt-contrib-jshint": "^0.11.2",
-    "grunt-contrib-nodeunit": "^0.4.1"
+    "grunt": ">=0.4.0",
+    "grunt-contrib-clean": ">=0.6.0",
+    "grunt-contrib-jshint": ">=0.11.2",
+    "grunt-contrib-nodeunit": ">=0.4.1"
   },
   "peerDependencies": {
-    "grunt": "^0.4.5"
+    "grunt": ">=0.4.0"
   },
   "keywords": [
     "gruntplugin",