diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 42dc2452..c8b263d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     env:
       RACK_VERSION: "${{ matrix.rack }}"
       RUBYOPT: "${{ matrix.rubyopt }}"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Check out code
         uses: actions/checkout@v4