diff --git a/doc/21-development.md b/doc/21-development.md
index ff24971a3..29e797ca3 100644
--- a/doc/21-development.md
+++ b/doc/21-development.md
@@ -1404,7 +1404,7 @@ the distribution already provides 1.66+. For older versions such as Stretch,
 include the release repository for packages.icinga.com as shown in the [setup instructions](02-installation.md#package-repositories-debian-ubuntu-raspbian).
 
 ```
-$ docker run -ti ubuntu:bionic bash
+$ docker run -ti debian:buster bash
 
 apt-get update
 apt-get -y install apt-transport-https wget gnupg