Upgrading a local installation of Antora

This section describes how to upgrade a local installation of Antora.

Prerequisites

A running version of yarn. See Installing Yarn.
./node_modules/.bin is in the PATH environment variable.

Procedure

Open a shell into the project directory and run following command:
```
$ yarn upgrade
```

Commit the changes in both files package.json and package-lock.json.

$ git add package.json yarn.lock
$ git commit -m "Upgrade Antora to new version"

Verification steps

Build the documentation as usual