diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
index e4bd3af4b..416f6fecb 100644
--- a/.github/workflows/smoke.yml
+++ b/.github/workflows/smoke.yml
@@ -14,7 +14,7 @@ on:
       - '**.txt'
 jobs:
   style:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -34,9 +34,9 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: ubuntu-latest, python: "3.12", ffmpeg: "7.1", extras: true}
-          - {os: ubuntu-latest, python: "3.9", ffmpeg: "7.0.2"}
-          - {os: ubuntu-latest, python: "pypy3.10", ffmpeg: "7.1"}
+          - {os: ubuntu-24.04, python: "3.12", ffmpeg: "7.1", extras: true}
+          - {os: ubuntu-24.04, python: "3.9", ffmpeg: "7.0.2"}
+          - {os: ubuntu-24.04, python: "pypy3.10", ffmpeg: "7.1"}
           - {os: macos-14, python: "3.9", ffmpeg: "7.1"}
           - {os: macos-14, python: "3.9", ffmpeg: "7.0.2"}
 
@@ -56,7 +56,7 @@ jobs:
     - name: OS Packages
       run: |
         case ${{ matrix.config.os }} in
-          ubuntu-latest)
+          ubuntu-24.04)
             sudo apt-get update
             sudo apt-get install autoconf automake build-essential cmake \
               libtool pkg-config nasm zlib1g-dev libvorbis-dev libx264-dev
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5bf768a28..a6c5232b3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -5,7 +5,7 @@ on:
   workflow_dispatch:
 jobs:
   package-source:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
@@ -34,9 +34,9 @@ jobs:
             arch: x86_64
           - os: ubuntu-24.04-arm
             arch: aarch64
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             arch: i686
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             arch: x86_64
           - os: windows-latest
             arch: AMD64