> For the complete documentation index, see [llms.txt](https://docs.trilio.io/openstack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgrade-triliovault.md).

# Supported Trilio Upgrade Path

The following versions can be upgraded to each other:

| From                                | To    |
| ----------------------------------- | ----- |
| 4.1 GA (4.1.94) or 4.1.HFx          | 5.x.x |
| 4.2 GA (4.2.64) or 4.2.HFx or 4.2.x | 5.x.x |
| 5.0 GA or 5.x.x                     | 6.x.x |