diff --git a/dev/ci/docker_linux/Dockerfile b/dev/ci/docker_linux/Dockerfile
index db58a1a3a6261..9cba6dcdbf1de 100644
--- a/dev/ci/docker_linux/Dockerfile
+++ b/dev/ci/docker_linux/Dockerfile
@@ -12,7 +12,7 @@
 
 # Last manual update 2021-09-24 (changing this comment will re-build image)
 
-FROM ubuntu:focal@sha256:f8f658407c35733471596f25fdb4ed748b80e545ab57e84efbdb1dbbb01bd70e
+FROM ubuntu:focal@sha256:c9820a44b950956a790c354700c1166a7ec648bc0d215fa438d3a339812f1d01
 MAINTAINER Flutter Developers <flutter-dev@googlegroups.com>
 
 ENV TZ=America/Los_Angeles