diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cffe787..8dbae38 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ on: [merge_group, push, pull_request]
 
 jobs:
   checks:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     container: debian:bookworm
     steps:
       - name: Bootstrap Debian system package dependencies
@@ -29,7 +29,7 @@ jobs:
           make test
 
   checksums:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     container: debian:bookworm
     steps:
       - name: Bootstrap Debian system package dependencies
diff --git a/.github/workflows/reprotest.yml b/.github/workflows/reprotest.yml
index 3263e53..c72d90e 100644
--- a/.github/workflows/reprotest.yml
+++ b/.github/workflows/reprotest.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   reprotest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     container: debian:bookworm
     steps:
       - name: Bootstrap Debian system package dependencies