diff --git a/package.json b/package.json
index 4a82de56e1..16e6b2b9df 100644
--- a/package.json
+++ b/package.json
@@ -97,7 +97,7 @@
     "markdownlint": "^0.20.4",
     "markdownlint-cli": "^0.23.2",
     "npm-run-all": "^4.1.5",
-    "optimize-css-assets-webpack-plugin": "^5.0.3",
+    "optimize-css-assets-webpack-plugin": "^6.0.0",
     "prettier": "^2.0.5",
     "prettier-plugin-html-template-literals": "^1.0.5",
     "style-loader": "^1.2.1",