diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 620e744..1c37e4a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ jobs:
     uses: beeware/.github/.github/workflows/app-build-verify.yml@main
     with:
       python-version: ${{ matrix.python-version }}
-      runner-os: macos-latest
+      runner-os: macos-15
       framework: ${{ matrix.framework }}
       target-platform: iOS
       target-format: Xcode