diff --git a/Dockerfile b/Dockerfile
index 83f49022..82fd4d50 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04 AS src
+FROM debian:bullseye-slim AS src
 LABEL Description="Tilemaker" Version="1.4.0"
 
 ARG DEBIAN_FRONTEND=noninteractive