diff --git a/package.json b/package.json
index 007a5c4..52dc708 100755
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "browser-sync": "^2.12.10",
     "gulp": "^3.9.1",
     "gulp-autoprefixer": "^3.1.0",
-    "gulp-clean-css": "^2.3.2",
+    "gulp-clean-css": "^4.0.0",
     "gulp-compass": "^2.1.0",
     "gulp-concat": "^2.6.0",
     "gulp-nunjucks-render": "^2.2.1",