---
title: "Important: #102875 - Updated Dependency: Doctrine DBAL 4"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:important-102875-1705915392"
source: "Changelog/13.0/Important-102875-UpdatedDependencyDoctrineDBAL4.rst"
typo3-version: "13.0"
typo3-major: 13
type: "important"
issue: 102875
forge: "https://forge.typo3.org/issues/102875"
tags: ["Database", "PHP-API", "ext:core"]
rendered: "2026-10-03T08:19:36+00:00"
---

# Important: #102875 - Updated Dependency: Doctrine DBAL 4 {#important-102875-1705915392}

See [forge#102875](https://forge.typo3.org/issues/102875)

## Description {#description}

TYPO3 v13 ships with Doctrine DBAL with at least version 4.0.

TYPO3 extends some Doctrine DBAL classes, enriching behaviour and provide
these as public API surface, for example `Connection`, `QueryBuilder`
and the `ExpressionBuilder` and are most likely used by extensions. Minor
signature changes and removed methods are not mitigated and passed as breaking
changes.

Custom extensions using low-level Doctrine DBAL API and functionality
directly need to adapt, consult the upgrade guides for Doctrine DBAL on how
to migrate.

See [Doctrine DBAL 4.0 Upgrade Guide](https://github.com/doctrine/dbal/blob/4.0.0/UPGRADE.md)
and [Doctrine DBAL 3.8 Upgrade Guide](https://github.com/doctrine/dbal/blob/3.8.0/UPGRADE.md)
for further information about Doctrine DBAL API changes and how to mitigate them.