> ## Documentation Index
> Fetch the complete documentation index at: https://docs.domino.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Upgrade Domino

When upgrading a Domino deployment to a new version, you can use the `custom_certificates` key in `domino.yml` to provide a new certificate bundle.

If the key is not yet specified, the installer will do the following:

* Any existing `domino-custom-certificates` bundle will continue to be used, and can still be updated independently of the installer.

* If there is no existing `domino-custom-certificates` ConfigMap, `custom_certificates` is not set, and the legacy `domino-executor-certificates` ConfigMap exists, it will be copied and upgraded to the new format/name. If you are using the `custom_certificates` field to configure certificate bundles and the `domino-executor-certificates` ConfigMap exists, make sure to copy the relevant contents of the `domino-executor-certificates` ConfigMap to the `domino.yml` as the ConfigMap will not be used.