diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 50c6b28f..38142e8f 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   swiftformat:
     name: SwiftFormat
-    runs-on: macos-latest
+    runs-on: macos-13
     steps:
     - uses: actions/checkout@v4
     - run: swiftformat . --lint --quiet --reporter github-actions-log