diff --git a/server.js b/server.js
index f7b7330b5..0bb8d3538 100644
--- a/server.js
+++ b/server.js
@@ -18,7 +18,7 @@ const app = express()
 
 function createRenderer (bundle, options) {
   // https://github.com/vuejs/vue/blob/dev/packages/vue-server-renderer/README.md#why-use-bundlerenderer
-  return createBundleRenderer(bundle, Object.assign(options, {
+  return createBundleRenderer(bundle, Object.assign({
     // for component caching
     cache: LRU({
       max: 1000,
@@ -28,7 +28,7 @@ function createRenderer (bundle, options) {
     basedir: resolve('./dist'),
     // recommended for performance
     runInNewContext: false
-  }))
+  }, options))
 }
 
 let renderer