diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1977d19..e79ad5d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,12 +13,12 @@ on:
 jobs:
   macos:
     name: macOS
-    runs-on: macos-latest
+    runs-on: macos-11
     steps:
     - name: Select latest available Xcode
       uses: maxim-lobanov/setup-xcode@v1
       with:
-        xcode-version: '12.4'
+        xcode-version: '13'
     - name: Checkout
       uses: actions/checkout@v2
     - name: Run tests