---
title: "Upgrading extensions"
manual: "TYPO3 Explained"
version: "12.4"
permalink: "https://docs.typo3.org/permalink/t3coreapi:upgradingextensions@12.4"
source: "Administration/Upgrade/UpgradingExtensions/Index.rst"
rendered: "2026-10-21T15:29:37+00:00"
---

> [!WARNING]
> **Attention**
>
> TYPO3 v12 has reached end-of-life as of April 30th 2026 and
> is no longer being maintained. Use the version switcher on the top
> left of this page to select documentation for a supported version of TYPO3.
>
> Need more time before upgrading?
> You can purchase Extended Long Term Support (ELTS) for TYPO3 v12 here:
> [TYPO3 ELTS](https://typo3.com/services/extended-support-elts).

# Upgrading extensions {#upgradingextensions}

How you upgrade extensions depends on your role and project setup:

-   If you use third-party extensions, update them via Composer or the
    Extension Manager.
-   If you **maintain your own custom extension or site package**, refer to
    the dedicated guide on updating your codebase.

**[Managing extensions with Composer](https://docs.typo3.org/permalink/t3coreapi:extensions-composer@12.4)**

Covers installation, upgrades, downgrades, removal, and update reverts
for Composer-based TYPO3 projects.

-   [Upgrade an extension](https://docs.typo3.org/permalink/t3coreapi:extensions-composer-update@12.4)
-   [Downgrade an extension](https://docs.typo3.org/permalink/t3coreapi:extensions-composer-downgrade@12.4)
-   [Revert updates safely](https://docs.typo3.org/permalink/t3coreapi:extensions-composer-update-revert@12.4)

**[Managing extensions via Extension Manager](https://docs.typo3.org/permalink/t3coreapi:extensions-classic-mode-management@12.4)**

For projects not using Composer, extensions can be installed and updated
using the TYPO3 backend's Extension Manager.

-   [Extension Manager documentation](https://docs.typo3.org/permalink/t3coreapi:extensions-classic-mode-management@12.4)

**[Maintaining your own extension](https://docs.typo3.org/permalink/t3coreapi:update-extension@12.4)**

If you maintain a custom extension or site package, see this
guide for tips on versioning, upgrading for new TYPO3 releases, and
ensuring compatibility.

-   [Update strategy for extension maintainers](https://docs.typo3.org/permalink/t3coreapi:update-extension@12.4)