# Upgrade Trilio

Starting Trilio for Openstack 4.0 does Trilio for Openstack allow in-place upgrades.

The following versions can be upgraded to each other:

| Old                      | New                      |
| ------------------------ | ------------------------ |
| 4.0 GA (4.0.92)          | 4.0 SP1 (4.0.115)        |
| 4.0 GA (4.0.92)          | 4.1 GA (4.1.94)          |
| 4.1 GA (4.1.94)          | 4.1 HF1 (4.1.94-hotfix1) |
| 4.1 GA (4.1.94)          | 4.1 HF2 (4.1.94-hotfix2) |
| 4.1 HF1 (4.1.94-hotfix1) | 4.1 HF2 (4.1.94-hotfix2) |

The upgrade process contains upgrading the Trilio appliance and the Openstack components and is dependent on the underlying operating system.

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The Upgrade of Trilio for Canonical Openstack is managed through the charms.
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