diff --git a/ui/index.ejs b/ui/index.ejs
index 2884b79c..30b501cf 100644
--- a/ui/index.ejs
+++ b/ui/index.ejs
@@ -9,10 +9,7 @@
     <title>Bull Dashboard</title>
   </head>
   <body>
-    <div id="root">Loading...</div>
-    <script>
-      window.basePath = '<%= basePath %>'
-    </script>
+    <div id="root" data-base-path="<%= basePath %>">Loading...</div>
     <script src="<%= basePath %>/static/bundle.js"></script>
   </body>
 </html>
diff --git a/ui/index.js b/ui/index.js
index 144fb47b..f1689965 100644
--- a/ui/index.js
+++ b/ui/index.js
@@ -4,4 +4,7 @@ import './index.css'
 import './xcode.css'
 import App from './components/App'
 
-render(<App basePath={window.basePath} />, document.getElementById('root'))
+const root = document.getElementById('root');
+const basePath = root.dataset.basePath;
+
+render(<App basePath={basePath} />, root)
