diff --git a/developer_manual/release_notes/critical_changes.rst b/developer_manual/release_notes/critical_changes.rst
index a8341d8881c..3a1492adda9 100644
--- a/developer_manual/release_notes/critical_changes.rst
+++ b/developer_manual/release_notes/critical_changes.rst
@@ -53,6 +53,17 @@ Removed back-end APIs
 
 - ``\OCP\Share_Backend``, ``\OCP\Share_Backend_Collection``, ``\OCP\Share_Backend_File_Dependent`` were removed. This old
   share backend was replaced in Nextcloud 9 with a new backend system based on ``IShareProvider``.
+- All these methods were deprecated since before Nextcloud 20 and were removed:
+  - ``\OCP\AppFramework\Http\EmptyContentSecurityPolicy::allowEvalScript``
+  - ``\OCP\AppFramework\Http\EmptyContentSecurityPolicy::addAllowedChildSrcDomain``
+  - ``\OCP\AppFramework\Http\EmptyContentSecurityPolicy::disallowChildSrcDomain``
+  - ``\OCP\Collaboration\Resources\IManager::registerResourceProvider``
+  - ``\OCP\Notification\IManager::registerNotifier``
+  - ``\OCP\Util::recursiveArraySearch``
+- All these classes were deprecated since before Nextcloud 20 and were removed:
+  - ``\OCP\AppFramework\Http\StrictContentSecurityPolicy``
+  - ``\OCP\AppFramework\Http\StrictEvalContentSecurityPolicy``
+  - ``\OCP\AppFramework\Http\StrictInlineContentSecurityPolicy``
 
 
 Unified sharing