diff --git a/webpack.config.js b/webpack.config.js
index 151bb28..8117b8d 100755
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -22,9 +22,10 @@ const defines = {
   __VERSION__: JSON.stringify(package.version),
 }
 
-module.exports = [
+module.exports = (env, argv) => [
   // WebExtension
   {
+    devtool: argv.mode === 'production' ? false : 'source-map',
     entry: {
       content: './src/content/content.ts',
       background: './src/background/background.ts',