---
title: Upgrading etcd clusters and applications
---

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

## Moving from etcd API v2 to API v3

* [Migrate applications from using API v2 to API v3][migrate-apps]

## Upgrading an etcd v3.x cluster
* [Upgrade etcd from 3.0 to 3.1](/docs/v3.3/upgrades/upgrade_3_1)
* [Upgrade etcd from 3.1 to 3.2](/docs/v3.3/upgrades/upgrade_3_2)
* [Upgrade etcd from 3.2 to 3.3](/docs/v3.3/upgrades/upgrade_3_3)
* [Upgrade etcd from 3.3 to 3.4](/docs/v3.3/upgrades/upgrade_3_4)

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


[migrate-apps]: /docs/v3.3/op-guide/v2-migration