diff --git a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_33.rst b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_33.rst
index 0d797ddb68b..2a36738d62b 100644
--- a/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_33.rst
+++ b/developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_33.rst
@@ -196,6 +196,10 @@ Added APIs
     }
     $result->closeCursor();
 
+- This version allows to expose some Nextcloud related metrics using OpenMetrics format.
+  You can add your own exporters by implementing ``\OCP\OpenMetrics\IMetricFamily`` interface.
+  See :doc:`/digging_deeper/openmetrics` for more information.
+
 Changed APIs
 ^^^^^^^^^^^^