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.
Major upgrade
You can find the current TYPO3 Core version in the top left of the TYPO3 backend.
Pre-upgrade tasks
Before upgrading TYPO3 to a major release, there are several tasks that can be performed to help ensure a successful upgrade and help minimise any potential downtime.
Upgrade the Core
This chapter details how to perform a major upgrade using Composer.
Post-upgrade tasks
Once TYPO3's Core has been upgraded, there are a few tasks that need to be followed to complete the process.