diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7ebf2d9..a8c0dfd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -36,7 +36,7 @@ jobs:
   
   test-macos:
     name: test on macos
-    runs-on: macos-latest
+    runs-on: macos-12
     steps:
       - name: install dependencies
         run: |