diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index e41fba56..9fdc5a0a 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -1,9 +1,9 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
-# Ubuntu 18.04 (bionic) from 2018-05-26
-# https://github.com/docker-library/official-images/commit/aac6a45b9eb2bffb8102353c350d341a410fb169
-ARG BASE_CONTAINER=ubuntu:bionic-20180526@sha256:c8c275751219dadad8fa56b3ac41ca6cb22219ff117ca98fe82b42f24e1ba64e
+# Ubuntu 18.04 (bionic) from 2019-06-12
+# https://github.com/tianon/docker-brew-ubuntu-core/commit/3c462555392cb188830b7c91e29311b5fad90cfe
+ARG BASE_CONTAINER=ubuntu:bionic-20190612@sha256:9b1702dcfe32c873a770a32cfd306dd7fc1c4fd134adfb783db68defc8894b3c
 FROM $BASE_CONTAINER
 
 LABEL maintainer="Jupyter Project <jupyter@googlegroups.com>"