# Upgrading etcd clusters and applications

> Documentation list for upgrading etcd clusters and applications

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LLMS index: [llms.txt](/llms.txt)

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This section contains documents specific to upgrading etcd clusters and applications.

## Upgrade policy

Before upgrading, note that etcd only supports the following two upgrade cases:

* **Patch upgrade:** Upgrading between patch releases within the same minor version (e.g. 3.7.0 - 3.7.1).
* **Minor upgrade:** Upgrading one minor version at a time (e.g. 3.6 - 3.7). Upgrades that skip a minor version are not supported and will likely fail. Update to the most recent patch version before upgrading to the next minor version.

## Upgrading an etcd v3.x cluster

* [Upgrade etcd from 3.0 to 3.1](/docs/etcd/upgrades/upgrade_3_1/)
* [Upgrade etcd from 3.1 to 3.2](/docs/etcd/upgrades/upgrade_3_2/)
* [Upgrade etcd from 3.2 to 3.3](/docs/etcd/upgrades/upgrade_3_3/)
* [Upgrade etcd from 3.3 to 3.4](/docs/etcd/upgrades/upgrade_3_4/)
* [Upgrade etcd from 3.4 to 3.5](/docs/etcd/upgrades/upgrade_3_5/)
* [Upgrade etcd from 3.5 to 3.6](/docs/etcd/upgrades/upgrade_3_6/)
* [Upgrade etcd from 3.6 to 3.7](/docs/etcd/upgrades/upgrade_3_7/)

## Upgrading from etcd v2.3

* [Upgrade a v2.3 cluster to v3.0](/docs/etcd/upgrades/upgrade_3_0/)