diff --git a/webpack.config.dev.js b/webpack.config.dev.js
index 9a2ddc329..46e1cd5ed 100644
--- a/webpack.config.dev.js
+++ b/webpack.config.dev.js
@@ -20,7 +20,7 @@ module.exports = merge(common, {
   plugins: [
     new webpack.DefinePlugin({
       'process.env': {
-        NODE_ENV: 'development'
+        NODE_ENV: '"development"'
       }
     }),
     new webpack.LoaderOptionsPlugin({
diff --git a/webpack.config.prod.js b/webpack.config.prod.js
index 68a929d0d..693fbe41f 100644
--- a/webpack.config.prod.js
+++ b/webpack.config.prod.js
@@ -17,7 +17,7 @@ module.exports = merge(common, {
   plugins: [
     new webpack.DefinePlugin({
       'process.env': {
-        NODE_ENV: 'production'
+        NODE_ENV: '"production"'
       }
     }),
     new webpack.LoaderOptionsPlugin({