---
title: "Upgrade"
description: "Upgrade options for Calico Open Source clusters covering Kubernetes, OpenShift, and OpenStack platforms with manifest, Helm, and operator install methods."
product: "Calico Open Source"
version: "3.33 (latest)"
section: "Installing and upgrading"
canonical_url: "https://docs.tigera.io/calico/latest/operations/upgrading/"
---

# Upgrade

## [📄️Upgrade notes](https://docs.tigera.io/calico/latest/operations/upgrading/upgrade-notes.md)

[Changes in each Calico Open Source release that need your attention before or during an upgrade, with the action to take for each.](https://docs.tigera.io/calico/latest/operations/upgrading/upgrade-notes.md)

## [📄️Upgrade Calico on Kubernetes](https://docs.tigera.io/calico/latest/operations/upgrading/kubernetes-upgrade.md)

[Upgrade Calico Open Source on Kubernetes for Helm, operator-managed, and manifest-based installs on both Kubernetes API and etcd datastores.](https://docs.tigera.io/calico/latest/operations/upgrading/kubernetes-upgrade.md)

## [📄️Upgrade Calico on OpenShift 4](https://docs.tigera.io/calico/latest/operations/upgrading/openshift-upgrade.md)

[Upgrade Calico Open Source on OpenShift 4 by reapplying the manifests for the new release.](https://docs.tigera.io/calico/latest/operations/upgrading/openshift-upgrade.md)

## [📄️Upgrade Calico on OpenStack](https://docs.tigera.io/calico/latest/operations/upgrading/openstack-upgrade.md)

[Upgrade Calico Open Source on OpenStack by updating system packages on CentOS or Ubuntu compute and control nodes.](https://docs.tigera.io/calico/latest/operations/upgrading/openstack-upgrade.md)