diff --git a/lib/webpack/client.config.js b/lib/webpack/client.config.js
index 46f1a14a45..d9c27e0a36 100644
--- a/lib/webpack/client.config.js
+++ b/lib/webpack/client.config.js
@@ -5,8 +5,12 @@ import webpack from 'webpack'
 import ExtractTextPlugin from 'extract-text-webpack-plugin'
 import ProgressBarPlugin from 'progress-bar-webpack-plugin'
 import { BundleAnalyzerPlugin } from 'webpack-bundle-analyzer'
+import OfflinePlugin from 'offline-plugin'
 import base from './base.config.js'
 import { resolve } from 'path'
+import fs from 'fs-extra'
+import pify from 'pify'
+const rename = pify(fs.rename)
 
 // offline plugin copy generated assets to static directory
 function OfflinePluginCopyAssetsPlugin(assets, toDir) {