diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8c81851e76..08adcd6863 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -8,7 +8,7 @@ on:
   - cron: 0 0 * * *
 jobs:
   ci:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         ruby-version:
diff --git a/bin/before_install b/bin/before_install
index bcbbac7f1c..241d9c6241 100755
--- a/bin/before_install
+++ b/bin/before_install
@@ -3,9 +3,7 @@
 if [ -n "$CI" ]; then
   echo "== Installing system packages =="
   sudo apt-get update
-  sudo apt-get install -y libcurl4-openssl-dev
-  sudo apt-add-repository --yes 'deb http://us.archive.ubuntu.com/ubuntu lunar universe'
-  sudo apt-get install -t lunar -y libqpid-proton11-dev
+  sudo apt-get install -y libcurl4-openssl-dev libqpid-proton11-dev
   echo
 
   # Enable the qpid_proton bundler group