diff --git a/developer_manual/app_publishing_maintenance/app_upgrade_guide/index.rst b/developer_manual/app_publishing_maintenance/app_upgrade_guide/index.rst
index 34d4ab508..ef131d8ed 100644
--- a/developer_manual/app_publishing_maintenance/app_upgrade_guide/index.rst
+++ b/developer_manual/app_publishing_maintenance/app_upgrade_guide/index.rst
@@ -9,6 +9,7 @@ These sub pages will cover the most important changes in Nextcloud, as well as s
 .. toctree::
    :maxdepth: 1
 
+   upgrade_to_26.rst
    upgrade_to_25.rst
    upgrade_to_24.rst
    upgrade_to_23.rst