diff --git a/config/webpack.dev.js b/config/webpack.dev.js
index 8ec11f9..83d4d38 100644
--- a/config/webpack.dev.js
+++ b/config/webpack.dev.js
@@ -4,10 +4,11 @@ module.exports = {
   entry: {
     skift: './src/index.ts'
   },
+  devtool: 'source-map',
   output: {
     path: path.resolve(__dirname, '../dist'),
     filename: '[name].js',
-    sourceMapFilename: 'dist/[name].source.map',
+    sourceMapFilename: '[name].source.map',
     library: 'skift',
     libraryTarget: 'umd'
   },