diff --git a/webpack.config.js b/webpack.config.js
index 1cfb9f2f..c19fc153 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -119,7 +119,7 @@ function devtoolModuleFilenameTemplate(info) {
 
 function extract(name, extractCss) {
     return {
-        test: RegExp(`css\/${name}\.css`),
+        test: RegExp(`css/${name}.css`),
         use: extractCss.extract([
             isDev ?
                 'css-loader'