diff --git a/CHANGELOG.md b/CHANGELOG.md
index 936b1dd1d7..cf9e8d52be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -68,6 +68,7 @@ The following sections list the changes for unreleased.
 * Enhancement - Bump reva: [#9662](https://github.com/owncloud/ocis/pull/9662)
 * Enhancement - Fix trash command: [#9665](https://github.com/owncloud/ocis/pull/9665)
 * Enhancement - Added the debugging to full ocis docker example: [#9666](https://github.com/owncloud/ocis/pull/9666)
+* Enhancement - Add locking support for MS Office Online Server: [#9685](https://github.com/owncloud/ocis/pull/9685)
 
 ## Details
 
@@ -227,6 +228,15 @@ The following sections list the changes for unreleased.
 
    https://github.com/owncloud/ocis/pull/9666
 
+* Enhancement - Add locking support for MS Office Online Server: [#9685](https://github.com/owncloud/ocis/pull/9685)
+
+   We added support for the special kind of lock tokens that MS Office Online
+   Server uses to lock files via the Wopi protocol. It will only be active if you
+   set the `COLLABORATION_APP_NAME` environment variable to
+   `MicrosoftOfficeOnline`.
+
+   https://github.com/owncloud/ocis/pull/9685
+
 # Changelog for [6.1.0] (2024-07-08)
 
 The following sections list the changes for 6.1.0.