diff --git a/package.json b/package.json
index 2456bb5..05d1202 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "homepage": "https://github.com/peterbe/autocompeter",
   "devDependencies": {
     "gulp": "3.9.1",
-    "gulp-clean-css": "2.0.10",
+    "gulp-clean-css": "3.7.0",
     "gulp-concat": "2.6.0",
     "gulp-header": "1.8.7",
     "gulp-jshint": "2.0.1",