diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 49a937e..ab0090b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest]
+        os: [macos-12, ubuntu-latest]
 
     steps:
     - name: Checkout