diff --git a/src/Squidex/app-config/webpack.run.dev.js b/src/Squidex/app-config/webpack.run.dev.js
index 1218816fb..357dd1f5a 100644
--- a/src/Squidex/app-config/webpack.run.dev.js
+++ b/src/Squidex/app-config/webpack.run.dev.js
@@ -6,6 +6,8 @@
 
 module.exports = webpackMerge(runConfig, {
     mode: 'development',
+    
+    devtool: 'source-map',
 
     output: {
         filename: '[name].js',