diff --git a/.github/workflows/test_pkg.yml b/.github/workflows/test_pkg.yml
index f7758eb..d33a751 100644
--- a/.github/workflows/test_pkg.yml
+++ b/.github/workflows/test_pkg.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macos-12]
         python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
 
     env: