diff --git a/package.json b/package.json
index 2eb87d1e32..e65ae6a36a 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "walk": "2.3.9"
   },
   "devDependencies": {
-    "clean-css": "3.4.6",
+    "clean-css": "3.4.7",
     "coveralls": "2.11.4",
     "debounce": "^1.0.0",
     "expect.js": "0.3.1",