diff --git a/Installation-using-egroupware-docker-RPM-DEB-package.md b/Installation-using-egroupware-docker-RPM-DEB-package.md
index 6c96912..276bbb1 100644
--- a/Installation-using-egroupware-docker-RPM-DEB-package.md
+++ b/Installation-using-egroupware-docker-RPM-DEB-package.md
@@ -30,7 +30,7 @@ You first need to create a repository file for your Linux distribution and versi
 I'll show it here in details for Ubuntu 20.04, for other distributions use [the above link](https://github.com/EGroupware/egroupware/wiki/20.1-Release-notes-and-distribution-specific-instructions). This is NOT necessary if you update, unless you use EPL before 19.1, which used a different repo.
 ```
 echo 'deb http://download.opensuse.org/repositories/server:/eGroupWare/xUbuntu_20.04/ /' | sudo tee /etc/apt/sources.list.d/server:eGroupWare.list
-sudo apt install gnupg # required, but not installed by apt-key add in Debian 10 
+sudo apt install gnupg # required, but not installed by apt-key add in Debian 10/11
 wget -nv https://download.opensuse.org/repositories/server:eGroupWare/xUbuntu_20.04/Release.key -O - | sudo apt-key add -
 sudo apt update
 ```