diff --git a/webpack.config.js b/webpack.config.js
index d012cdd..8283783 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -31,7 +31,7 @@ if (process.env.NODE_ENV === 'production') {
   plugins.push(
     new webpack.DefinePlugin({
       'process.env': {
-        NODE_ENV: 'production',
+        NODE_ENV: JSON.stringify('production'),
       },
     })
   )