diff --git a/package.json b/package.json
index 3cde77411..eca7ee556 100644
--- a/package.json
+++ b/package.json
@@ -19,9 +19,9 @@
     "grunt": "~0.4.1",
     "grunt-bump": "~0.0.0",
     "grunt-contrib-clean": "~0.4.0",
-    "grunt-contrib-coffee": "~0.6.5",
+    "grunt-contrib-coffee": "~0.6.6",
     "grunt-contrib-compress": "~0.4.9",
-    "grunt-contrib-concat": "~0.1.3",
+    "grunt-contrib-concat": "~0.2.0",
     "grunt-contrib-copy": "~0.4.1",
     "grunt-contrib-watch": "~0.3.1",
     "grunt-exec": "~0.4.0"