diff --git a/nico.js b/nico.js
index d308388fb3..96e469ad15 100644
--- a/nico.js
+++ b/nico.js
@@ -31,7 +31,7 @@ exports.ignorefilter = function(filepath, subdir) {
 };
 exports.middlewares = [{
   name: 'webpackDevMiddleware',
-  filter: /antd\.(js|css)$/,
+  filter: /antd\.(js|css)(\.map)?$/,
   handle: webpackMiddleware(webpackCompiler, {
     publicPath: '/dist/',
     lazy: false,
diff --git a/webpack.config.js b/webpack.config.js
index 9b7e00c15b..8cc2cf7253 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -44,5 +44,7 @@ module.exports = {
 
   plugins: [
     new ExtractTextPlugin('[name].css')
-  ]
+  ],
+
+  devtool: 'source-map'
 };