diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf7afd7f49..7e2811d426 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ The following sections list the changes for unreleased.
 * Bugfix - Don't connect to ldap on startup: [#6565](https://github.com/owncloud/ocis/pull/6565)
 * Bugfix - Handle the bad request status: [#6469](https://github.com/owncloud/ocis/pull/6469)
 * Bugfix - Fix the oidc role assigner: [#6605](https://github.com/owncloud/ocis/pull/6605)
+* Change - YAML configuration files are restricted to yaml-1.2: [#6510](https://github.com/owncloud/ocis/issues/6510)
 * Enhancement - Add 'ocis decomposedfs check-treesize' command: [#6556](https://github.com/owncloud/ocis/pull/6556)
 * Enhancement - Add IDs to graph resource logging: [#6593](https://github.com/owncloud/ocis/pull/6593)
 * Enhancement - Add permissions to report: [#6528](https://github.com/owncloud/ocis/pull/6528)
@@ -84,6 +85,18 @@ The following sections list the changes for unreleased.
    https://github.com/owncloud/ocis/pull/6605
    https://github.com/owncloud/ocis/pull/6618
 
+* Change - YAML configuration files are restricted to yaml-1.2: [#6510](https://github.com/owncloud/ocis/issues/6510)
+
+   For parsing YAML based configuration files we utilize the gookit/config module. That module
+   has dropped support for older variants of the YAML format. It now only supports the YAML 1.2
+   syntax. If you're using yaml configuration files, please make sure to update your files
+   accordingly. The most significant change likely is that only the string `true` and `false`
+   (including `TRUE`,`True`, `FALSE` and `False`) are now parsed as booleans. `Yes`, `On` and
+   other values are not longer considered valid values for booleans.
+
+   https://github.com/owncloud/ocis/issues/6510
+   https://github.com/owncloud/ocis/pull/6493
+
 * Enhancement - Add 'ocis decomposedfs check-treesize' command: [#6556](https://github.com/owncloud/ocis/pull/6556)
 
    We added a 'ocis decomposedfs check-treesize' command for checking (and reparing) the