diff --git a/webpack.config.js b/webpack.config.js
index 2a85b970e..b6c859340 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -5,8 +5,8 @@ module.exports = {
     'gridstack-all': './src/gridstack.ts',
   },
   mode: 'production', // production vs development
-  // devtool: 'source-map',
-  devtool: 'eval-source-map', // for best (large .js) debugging. see https://survivejs.com/webpack/building/source-maps/
+  devtool: 'source-map',
+  // devtool: 'eval-source-map', // for best (large .js) debugging. see https://survivejs.com/webpack/building/source-maps/
   module: {
     rules: [
       {