diff --git a/docker/docker-base/Dockerfile b/docker/docker-base/Dockerfile
index fd08ae73e0..343d74c734 100644
--- a/docker/docker-base/Dockerfile
+++ b/docker/docker-base/Dockerfile
@@ -2,7 +2,7 @@
 # Dockerfile for the basic link-grammar source download.
 # No compilation is performed.
 #
-FROM ubuntu:14.04
+FROM ubuntu:trusty-20190425
 MAINTAINER Linas Vepstas linasvepstas@gmail.com
 
 RUN apt-get update