diff --git a/base-notebook/Dockerfile b/base-notebook/Dockerfile
index ef5713c9..4b6d30f1 100644
--- a/base-notebook/Dockerfile
+++ b/base-notebook/Dockerfile
@@ -4,7 +4,7 @@
 # Ubuntu 20.04 (focal)
 # https://hub.docker.com/_/ubuntu/?tab=tags&name=focal
 # OS/ARCH: linux/amd64
-ARG ROOT_CONTAINER=ubuntu:focal-20210416@sha256:86ac87f73641c920fb42cc9612d4fb57b5626b56ea2a19b894d0673fd5b4f2e9
+ARG ROOT_CONTAINER=ubuntu:focal-20210609@sha256:376209074d481dca0a9cf4282710cd30a9e7ff402dea8261acdaaf57a18971dd
 
 ARG BASE_CONTAINER=$ROOT_CONTAINER
 FROM $BASE_CONTAINER