Hello
The file `/etc/kibana/kibana.yml` must contain 3 settings for that:
```
server.ssl.enabled: true
server.ssl.certificate: "/path/to/your/certificate.pem"
server.ssl.key: "/path/to/your/key.key"
```
If you have any other certificates signed by an authority, you should be able to use them.
Hope it helps
Regards,