//Module included in the following assemblies:
//
//* microshift_install_rpm_ostree/microshift-embed-in-rpm-ostree.adoc

:_mod-docs-content-type: CONCEPT
[id="microshift-ca-adding-bundle_{context}"]
= Adding a certificate authority bundle

{microshift-short} uses the host trust bundle when clients evaluate server certificates. You can also use a customized security certificate chain to improve the compatibility of your endpoint certificates with clients specific to your deployments. To do this, you can add a certificate authority (CA) bundle with root and intermediate certificates to the {op-system-ostree-first} system-wide trust store.