diff --git a/.cirrus.yml b/.cirrus.yml
index 249dfe00..063bac16 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -127,10 +127,10 @@ opensuse_tumbleweed_task:
   << : *CI_TEMPLATE
   << : *UNIX_ENV
 
-ubuntu23_task:
+ubuntu24_task:
   container:
-    # Ubuntu 23.10 EOL: July 2024
-    dockerfile: ci/ubuntu-23.10/Dockerfile
+    # Ubuntu 24.04 EOL: Jun 2029
+    dockerfile: ci/ubuntu-24.04/Dockerfile
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
   << : *UNIX_ENV
diff --git a/ci/ubuntu-23.10/Dockerfile b/ci/ubuntu-24.04/Dockerfile
similarity index 89%
rename from ci/ubuntu-23.10/Dockerfile
rename to ci/ubuntu-24.04/Dockerfile
index 47c16ca6..00dc4b33 100644
--- a/ci/ubuntu-23.10/Dockerfile
+++ b/ci/ubuntu-24.04/Dockerfile
@@ -1,10 +1,10 @@
-FROM ubuntu:23.10
+FROM ubuntu:24.04
 
 ENV DEBIAN_FRONTEND="noninteractive" TZ="America/Los_Angeles"
 
 # A version field to invalidate Cirrus's build cache when needed, as suggested in
 # https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
-ENV DOCKERFILE_VERSION 20231213
+ENV DOCKERFILE_VERSION 20240510
 
 RUN apt-get update && apt-get -y install \
     cmake \