diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2f0ebbf..dbccbd0 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster
+FROM debian:bullseye-slim
 
 EXPOSE 2244
 ENV DEBIAN_FRONTEND=noninteractive