diff --git a/20.1--Installation-using-egroupware-docker-RPM-DEB-package.md b/20.1--Installation-using-egroupware-docker-RPM-DEB-package.md
index cb34ac2..a0e6861 100644
--- a/20.1--Installation-using-egroupware-docker-RPM-DEB-package.md
+++ b/20.1--Installation-using-egroupware-docker-RPM-DEB-package.md
@@ -23,6 +23,8 @@ wget -nv https://download.opensuse.org/repositories/server:eGroupWare/xUbuntu_20
 apt update
 ```
 
+> We have now also a 20.1 Univention App available in their TestAppCenter, which [need to be enabled](https://docs.software-univention.de/app-provider.html#testing:test-app-center) before you get the 20.1 versions offered for updating as usual.
+
 ### To upgrade in place from 19.1
 ```
 apt upgrade