diff --git a/package.json b/package.json
index e4945eb..04686d9 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
     "compression-webpack-plugin": "^6.0.0",
     "copy-webpack-plugin": "^6.1.0",
     "css-loader": "^4.3.0",
+    "css-minimizer-webpack-plugin": "^1.3.0",
     "eslint": "^7.10.0",
     "eslint-config-standard": "^14.1.1",
     "eslint-config-standard-react": "^9.2.0",
@@ -35,15 +36,13 @@
     "htmlparser": "^1.7.7",
     "jed": "^1.1.1",
     "mini-css-extract-plugin": "^0.11.0",
-    "optimize-css-assets-webpack-plugin": "^5.0.3",
     "po2json": "^1.0.0-alpha",
     "qunit": "^2.9.3",
     "sizzle": "^2.3.3",
     "stdio": "^2.1.0",
-    "string-replace-loader": "^2.3.0",
-    "terser-webpack-plugin": "^2.0.1",
-    "webpack": "^4.35.3",
-    "webpack-cli": "^3.3.5"
+    "string-replace-loader": "^3.0.0",
+    "webpack": "^5.31.0",
+    "webpack-cli": "^4.6.0"
   },
   "dependencies": {
     "@patternfly/patternfly": "4.96.2",
diff --git a/webpack.config.js b/webpack.config.js
index 6f556bc..46daef5 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -3,8 +3,7 @@ const childProcess = require('child_process');
 
 const copy = require("copy-webpack-plugin");
 const extract = require("mini-css-extract-plugin");
-const TerserJSPlugin = require('terser-webpack-plugin');
-const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
 const CompressionPlugin = require("compression-webpack-plugin");
 const ESLintPlugin = require('eslint-webpack-plugin');
 const CockpitPoPlugin = require("./src/lib/cockpit-po-plugin");
@@ -70,7 +69,7 @@ module.exports = {
 
     optimization: {
         minimize: production,
-        minimizer: [new TerserJSPlugin({}), new OptimizeCSSAssetsPlugin({})],
+        minimizer: [`...`, new CssMinimizerPlugin()],
     },
 
     module: {