diff --git a/docker-compose.yml b/docker-compose.yml
index d2ea8f6..41ad101 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -47,7 +47,7 @@ services:
       # - sqlite:///data/sqlite.db (NOT RECOMMENDED)
       # - For details see the official sequelize docs: http://docs.sequelizejs.com/en/v3/
       - CMD_DB_URL=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_DB}:5432/hackmd
-    ports:
+    # ports:
       # Ports that are published to the outside.
       # The latter port is the port inside the container. It should always stay on 3000
       # If you only specify a port it'll published on all interfaces. If you want to use a