diff --git a/config/webpack.config.js b/config/webpack.config.js
index f7063442618..1218b0ef208 100644
--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -118,7 +118,10 @@ var config = {
       },
       {
         test: /\_worker\.js$/,
-        loader: 'worker-loader',
+        use: [
+          { loader: 'worker-loader' },
+          { loader: 'babel-loader' },
+        ],
       },
       {
         test: /\.(worker(\.min)?\.js|pdf|bmpr)$/,