diff --git a/9.6/Dockerfile b/9.6/Dockerfile
index 0d9e4c74b7..c492b4ee1c 100644
--- a/9.6/Dockerfile
+++ b/9.6/Dockerfile
@@ -1,5 +1,5 @@
 # vim:set ft=dockerfile:
-FROM debian:jessie
+FROM ubuntu:16.04
 
 RUN set -ex; \
 	if ! command -v gpg > /dev/null; then \