I have a image "x/jenkins-base" using 

```
FROM jenkins/jenkins:lts

```

which is used by another one using

```
FROM x/jenkins-base

```

Now, despite doing 

```
docker pull jenkins/jenkins:lts

```

The image seems to be stuck at Jenkins 2.60.3.

The [jenkins/jenkins Dockerfile on GitHub](https://github.com/jenkinsci/docker/blob/master/Dockerfile) indeed still references 2.60.3.

So how can I update to the latest LTS (today at 2.89.1)?