diff --git a/server.js b/server.js
index 436d35d..6d13f1f 100644
--- a/server.js
+++ b/server.js
@@ -39,7 +39,7 @@ app.get('/callback', async (req, res) => {
       'client_secret': process.env.CLIENT_SECRET,
       'code': authorizationCode,
       'grant_type': 'authorization_code',
-      'redirect_uri': `http://localhost:${port}/callback`
+      'redirect_uri': `https://${process.env.VERCEL_BRANCH_URL}/callback`
     });
     
     fetch(tokenEndpoint, {