diff --git a/lib/browser.js b/lib/browser.js
index 4784a98..17a13b4 100644
--- a/lib/browser.js
+++ b/lib/browser.js
@@ -1,5 +1,7 @@
 if (process.title === 'browser') {
-  const App = require('derby/App').App;
+  const AppModule = require('derby/App');
+  // AppForClient introduced in derby@4
+  const App = AppModule.AppForClient || AppModule.App;
 
   App.prototype._views = function () {
     const appName = this.name;