diff --git a/app_clients/elasticsearch-stress/Dockerfile b/app_clients/elasticsearch-stress/Dockerfile
index 10954acf..83ff8dde 100644
--- a/app_clients/elasticsearch-stress/Dockerfile
+++ b/app_clients/elasticsearch-stress/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:16.04
+FROM ubuntu:xenial-20210114
 
 RUN apt-get update && apt-get install -y --no-install-recommends apt-utils \
     python \