diff --git a/docker-squid/Dockerfile b/docker-squid/Dockerfile
index 952e881..0243198 100644
--- a/docker-squid/Dockerfile
+++ b/docker-squid/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:zesty
+FROM ubuntu:artful
 
 # Normalize apt sources
 RUN cat /etc/apt/sources.list | grep -v '^#' | sed /^$/d | sort | uniq > sources.tmp.1 && \