diff --git a/tensorflow/tools/ci_build/Dockerfile.cpu-py36 b/tensorflow/tools/ci_build/Dockerfile.cpu-py36
index 891a65ce9d844a..3d2ffe3850a9c1 100644
--- a/tensorflow/tools/ci_build/Dockerfile.cpu-py36
+++ b/tensorflow/tools/ci_build/Dockerfile.cpu-py36
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210416
 
 LABEL maintainer="Rama Ketineni <rama.ketineni@intel.com>"