diff --git a/Dockerfile b/Dockerfile
index 5695636..7adcba3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster
+FROM debian:stretch
 MAINTAINER Benjamin Bohard
 
 RUN apt update && apt install -y ca-certificates gnupg aptly aptly-publisher && apt clean