diff --git a/ubuntu-16.04/Dockerfile b/ubuntu-16.04/Dockerfile
index c2272d5..e1810cf 100644
--- a/ubuntu-16.04/Dockerfile
+++ b/ubuntu-16.04/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210804
 LABEL maintainer="sean@sean.io"
 ARG BUILD_DATE
 ARG VCS_REF