diff --git a/plugins/gui/frontend/gosa/source/resource/gosa/js/monaco-editor/package.json b/plugins/gui/frontend/gosa/source/resource/gosa/js/monaco-editor/package.json
index 8c094c2a..23a2f388 100644
--- a/plugins/gui/frontend/gosa/source/resource/gosa/js/monaco-editor/package.json
+++ b/plugins/gui/frontend/gosa/source/resource/gosa/js/monaco-editor/package.json
@@ -54,7 +54,7 @@
   "dependencies": {},
   "description": "A browser based code editor",
   "devDependencies": {
-    "clean-css": "^3.4.20",
+    "clean-css": "^4.2.1",
     "event-stream": "^3.3.2",
     "gulp": "^3.9.1",
     "gulp-typedoc": "^2.0.0",