diff --git a/docker-compose.yml b/docker-compose.yml
index bfe2d35..1e0dc8b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,3 +9,4 @@ services:
     restart: unless-stopped
     environment:
       - NODE_ENV=production
+      - PORT=3000 # Internal container port