Updating Watchtower

If Watchtower is monitoring the same Docker daemon under which the Watchtower container itself is running (i.e. if you volume-mounted /var/run/docker.sock into the Watchtower container) then it has the ability to update itself.

If a new version of the nickfedor/watchtower image is pushed to the Docker Hub, your Watchtower will pull down the new image and restart itself automatically.