diff --git a/package.json b/package.json
index f818671c6f4..9b6ed0e8ed4 100644
--- a/package.json
+++ b/package.json
@@ -134,7 +134,7 @@
 		"archiver": "5.3.0",
 		"babel-eslint": "10.1.0",
 		"babel-loader": "8.2.2",
-		"clean-css": "5.1.5",
+		"clean-css": "5.3.3",
 		"clean-webpack-plugin": "4.0.0",
 		"codemirror": "5.62.3",
 		"copy-webpack-plugin": "9.0.1",