diff --git a/docker/standalone/cpu-ubuntu/Dockerfile b/docker/standalone/cpu-ubuntu/Dockerfile
index 14fb0cca8..e8b112cd6 100644
--- a/docker/standalone/cpu-ubuntu/Dockerfile
+++ b/docker/standalone/cpu-ubuntu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210114
 MAINTAINER caffe-maint@googlegroups.com
 
 #ENV http_proxy proxy:port