diff --git a/python/bottle/container/Application/Dockerfile b/python/bottle/container/Application/Dockerfile
index bdbc17a7c..440c58456 100644
--- a/python/bottle/container/Application/Dockerfile
+++ b/python/bottle/container/Application/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210114
 LABEL maintainer="Azure App Service Container Images <appsvc-images@microsoft.com>"
 
 RUN apt-get update && apt-get install -y python-pip python-dev && apt-get clean