diff --git a/spamd/Dockerfile b/spamd/Dockerfile
index fd058c3d8e3f799862347cbd2181d5e6ec36b0dc..53d1f4c30fc305fc98cc5ace4f8ffdf23e03ae23 100644
--- a/spamd/Dockerfile
+++ b/spamd/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:stretch-slim
+FROM debian:buster-slim
 # hadolint ignore=DL3008
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \