diff --git a/quickstart/Dockerfile b/quickstart/Dockerfile
index b04d6995..4458394c 100644
--- a/quickstart/Dockerfile
+++ b/quickstart/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu
+FROM ubuntu:14.04
 MAINTAINER kyurtsever@google.com dengnan@google.com vmarmol@google.com
 
 # Get the lmctfy dependencies.