diff --git a/app/layout.tsx b/app/layout.tsx
index 638dbbf..a32b223 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -9,7 +9,9 @@ import { Header } from '@/components/header'
 import { Toaster } from '@/components/ui/sonner'
 
 export const metadata = {
-  metadataBase: new URL(`https://${process.env.VERCEL_URL}`),
+  metadataBase: process.env.VERCEL_URL
+    ? new URL(`https://${process.env.VERCEL_URL}`)
+    : undefined,
   title: {
     default: 'Next.js AI Chatbot',
     template: `%s - Next.js AI Chatbot`