diff --git a/Documentation/Tools/Index.rst b/Documentation/Tools/Index.rst
index 568913f2..a56f0a28 100644
--- a/Documentation/Tools/Index.rst
+++ b/Documentation/Tools/Index.rst
@@ -30,3 +30,18 @@ Support
 
 Visit the `TYPO3 Slack <https://typo3.org/community/meet/chat-slack>`__ and search for the `#ext-typo3-rector`
 channel. You can also open an issue or start a discussion on the projects GitHub page.
+
+EXT: Core Upgrader (v2)
+=======================
+
+The TYPO3 extension was initially developed as
+`EXT:core-upgrader <https://github.com/IchHabRecht/core_upgrader>` (Composer package
+`ichhabrecht/core-upgrader`, compatible up to TYPO3 v10) and has been forked as
+`EXT:core-upgraderv2 <https://github.com/WapplerSystems/core_upgrader>` (Composer package
+`wapplersystems/core-upgrader`, compatible up to TYPO3 v12).
+
+The extension allows to perform multiple TYPO3 Core version upgrades in one step by offering
+the older upgrade wizards.
+
+Another way to perform (and test/verify) upgrades of multiple TYPO3 versions in one go is outlined
+in a `blog article "Automatic TYPO3 Updates Across Several Major Versions With DDEV <https://typo3.org/article/automatic-typo3-updates-across-several-major-versions-with-ddev>`.