diff --git a/packages/@vue/cli-service/lib/commands/serve.js b/packages/@vue/cli-service/lib/commands/serve.js
index <HASH>..<HASH> 100644
--- a/packages/@vue/cli-service/lib/commands/serve.js
+++ b/packages/@vue/cli-service/lib/commands/serve.js
@@ -51,7 +51,7 @@ module.exports = (api, options) => {
     api.chainWebpack(webpackConfig => {
       if (process.env.NODE_ENV !== 'production' && process.env.NODE_ENV !== 'test') {
         webpackConfig
-          .devtool('cheap-module-eval-source-map')
+          .devtool('eval-cheap-module-source-map')
 
         webpackConfig
           .plugin('hmr')
refactor(cli-service): webpack `devtool` option (#<I>)

Close: #<I>