--- title: TYPO3 10.4.7 / TYPO3 10.4.8 and 9.5.21 maintenance releases published url: "https://news.typo3.com/article/typo3-1047-and-9521-maintenance-releases-published" image: "https://news.typo3.com/_assets/d1e01514e4c4a5b3147940fa2ec50682/Images/og-image-news.jpg" date: 2026-06-11 modified: 2026-06-11 categories: - "Developer & Technology" - "Product Updates & Roadmap" --- # TYPO3 10.4.7 / TYPO3 10.4.8 and 9.5.21 maintenance releases published - [Developer & Technology](https://news.typo3.com/article/category/developer-technology) - [Product Updates & Roadmap](https://news.typo3.com/article/category/product-updates-roadmap) TYPO3 10.4.7 / TYPO3 10.4.8 and 9.5.21 maintenance releases published ===================================================================== 08 September 2020 - ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/860e9e538aa963a3600a2488dff48070.jpeg)[Benni Mack](https://news.typo3.com/article/author/benni-mack) The versions 10.4.7 and 9.5.21 of the TYPO3 Enterprise Content Management System have just been released. The following TYPO3 updates have been released: - TYPO3 10.4.7 LTS - TYPO3 9.5.21 LTS Both versions are maintenance releases only. **Update September 10, 2020 Further release of TYPO3 v10.4.8 LTS affecting composer-based installations** We've released another TYPO3 v10 release on Thursday, September 10, 2020 – TYPO3 v10.4.8 LTS. It seemed like not every TYPO3 user could update to the latest TYPO3 v10 version due to issues regarding resolving dependencies with Symfony 4 (which were accidentally raised to Symfony 5 due to a dependency-of-a-dependency issue). For this reason, we've created an [intermediate package](https://packagist.org/packages/typo3/symfony-psr-event-dispatcher-adapter) which is compatible with Symfony 4 + 5. We've included this in TYPO3 v10.4.8 now, so everybody who is using TYPO3 v10 with composer can safely upgrade now.   TYPO3 installations in non-composer-mode ("zip download") and all TYPO3 v9 versions are **NOT** affected! ### Further upgrade instructions No database upgrades are required for these maintenance releases. ### Download TYPO3 can be installed in various ways. For example the traditional way by using the source package at get.typo3.org or the modern way by setting up a project using composer, to name just two. Further details can be found in the according release notes: - - ![](https://news.typo3.com/typo3temp/assets/t3g/blog/gravatar/d2f68d86720b93361f6910922465f559.jpeg) About the Author [Benni Mack](https://news.typo3.com/article/author/benni-mack) CTO at b13,Stuttgart, Germany [Website](https://b13.com/)[Twitter](https://twitter.com/bennimack)[LinkedIn](https://www.linkedin.com/in/benjaminmack/) Being the CTO at b13 GmbH, Benni is the TYPO3 Core Project Lead and one of the driving forces behind the TYPO3 community in the last years. [More posts by this author](https://news.typo3.com/article/author/benni-mack)