# docker compose file not working ## Version 1 to 2.x In the majority of cases, moving from version 1 to 2 is a very simple process: 1. Indent the whole file by one level and put a services: key at the top. 2. Add a version: '2' line at the top of the file. ```dockerfile= version: "2" services: keystonejs: image: ntutselab/keystonejs ports: - "3000:3000" links: - mongodb mongodb: image: mongo ports: - "27017:27017" ```