diff --git a/docker-compose.yml b/docker-compose.yml
index 3d265fa..24004bb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,4 +14,4 @@ services:
     env_file:
       - .env
     ports:
-      - 8000:$PORT
+      - "${PORT}:${PORT}"