diff --git a/docker/php71build/Dockerfile b/docker/php71build/Dockerfile
index 2f0ea96..ae2eed9 100644
--- a/docker/php71build/Dockerfile
+++ b/docker/php71build/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu
+FROM ubuntu:22.10
 
 ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update