diff --git a/Dockerfile b/Dockerfile
index 441ef793940035a1b9f61e782839c37cd941ee08..143a2206bdf9e33ca855a3b06337a9e4785fe2e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,4 @@
-# Alertmanager >= 0.17 wanted, bullseye ships 0.20
-FROM debian:stable-slim
+FROM registry.git.autistici.org/pipelines/images/base/debian:bookworm
 
 RUN apt-get -q update && \
     env DEBIAN_FRONTEND=noninteractive apt-get -y install prometheus-alertmanager ca-certificates && \