diff --git a/Dockerfile b/Dockerfile
index 448223e651df509986635d28e2566a42e179d50c..e7217555dc4898bd5295dab03b107c5e31f5c75a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bullseye
+FROM debian:stable-slim
 COPY build.sh /tmp/build.sh
 COPY with-ssh-key /usr/bin/with-ssh-key
 RUN /tmp/build.sh && rm /tmp/build.sh