Homestead not upgrading?

Hello, I'm using Homestead. When I vagrant ssh to my Homestead I see this:

Welcome to Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-45-generic x86_64)

Thanks for using
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| |__   ___  _ __ ___   ___  ___| |_ ___  __ _  __| |
| '_ \ / _ \| '_ ` _ \ / _ \/ __| __/ _ \/ _` |/ _` |
| | | | (_) | | | | | |  __/\__ \ ||  __/ (_| | (_| |
|_| |_|\___/|_| |_| |_|\___||___/\__\___|\__,_|\__,_|

* Homestead v9.0.0 released
* Settler v8.0.0 released

 * Canonical Livepatch is available for installation.
   - Reduce system reboots and improve kernel security. Activate at:
     https://ubuntu.com/livepatch

109 packages can be updated.
49 updates are security updates.

And my PHP-version is:

php -v
PHP 7.3.1-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Jan 13 2019 10:19:33) ( NTS )

I ran vagrant box update because when doing vagrant up I mentioned that there was an update available. So I ran this one. But it doesn't look like my Homestead is upgraded to the newest version.

What am I doing wrong? What am I missing? I wanna upgrade to the latest Homestead with keeping my PostgreSQL database intact.