diff --git a/lib/webpack/createServerConfig.js b/lib/webpack/createServerConfig.js
index 2c972c5153..e9f098354b 100644
--- a/lib/webpack/createServerConfig.js
+++ b/lib/webpack/createServerConfig.js
@@ -12,6 +12,7 @@ module.exports = function createServerConfig (options, cliOptions) {
   config
     .target('node')
     .externals([/^vue|vue-router$/])
+    .devtool('source-map')
 
   // no need to minimize server build
   config.optimization.minimize(false)