diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 1be2005eb..23054e6d8 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -17,7 +17,7 @@ env:
 jobs:
   build-deploy-docs:
     name: Docs
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@0.12.1
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6ae883cc3..8495f58b0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   pre-commit:
     name: Lint
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@0.12.1
@@ -27,7 +27,7 @@ jobs:
     strategy:
       matrix:
         python: [ 3.9, 3.12 ]
-        os:  [ macos-latest, ubuntu-latest, windows-latest ]
+        os:  [ macos-latest, ubuntu-24.04, windows-latest ]
     defaults:
       run:
         shell: bash
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index db4035be2..94806668c 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -57,7 +57,7 @@ jobs:
           path: dist
 
   manylinux:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4.2.2
@@ -115,7 +115,7 @@ jobs:
           tskit provenances tmp.trees
 
   manylinux-test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     needs: ['manylinux']
     strategy:
       matrix:
@@ -143,7 +143,7 @@ jobs:
 
 
   PyPI_Upload:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     environment: release
     needs: ['OSX-test', 'manylinux-test']
     permissions: