diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 15ff328ef..c91dde31b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,3 +1,5 @@
+# https://docs.github.com/en/actions/use-cases-and-examples/deploying/installing-an-apple-certificate-on-macos-runners-for-xcode-development
+
 name: build
 on:
   push:
@@ -11,7 +13,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.10  # Should be 3.13
+          allow-prereleases: true
       - run: pip install --upgrade pip
       - run: sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
       - run: ./setup.sh