diff --git a/Dockerfile b/Dockerfile
index 5caae9ebc389a34720185bc91d67bb56e4152180..c952ecfdb11b192f15a4856adc45507565e47808 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM registry.icinga.com/build-docker/raspbian-base/buster
+FROM registry.icinga.com/build-docker/raspbian-base/bullseye
 
 ENV DEBIAN_FRONTEND=noninteractive