diff --git a/config/config.js b/config/config.js
index c1240284..9b500b29 100644
--- a/config/config.js
+++ b/config/config.js
@@ -99,7 +99,4 @@ export default {
   },
 
   chainWebpack: webpackPlugin,
-  cssnano: {
-    mergeRules: false,
-  },
 };