diff --git a/docker-compose.backend.yml b/docker-compose.backend.yml
index 4292396..f847594 100644
--- a/docker-compose.backend.yml
+++ b/docker-compose.backend.yml
@@ -9,10 +9,6 @@ services:
       COOKIE_SECURE: "true"
     volumes:
       - backend-uploads:/app/uploads
-    ports:
-      - "4000:4000"
-    expose:
-      - "4000"
     labels:
       - traefik.enable=true
       - traefik.http.routers.backend.rule=Host(`backend.basetracker.lona-development.org`)
diff --git a/frontend/app/page.tsx b/frontend/app/page.tsx
index 16eea77..fe40b2b 100644
--- a/frontend/app/page.tsx
+++ b/frontend/app/page.tsx
@@ -5,7 +5,7 @@ import { FormEvent, useEffect, useMemo, useRef, useState } from 'react';
 const defaultApiBase =
   process.env.NODE_ENV === 'production'
     ? 'https://backend.basetracker.lona-development.org'
-    : 'http://localhost:4100';
+    : 'https://backend.dev.basetracker.lona-development.org';
 
 // Normalize backend URL so production always uses HTTPS while keeping local HTTP.
 function normalizeApiBase(url: string) {