diff --git a/.github/workflows/ci_tests.yaml b/.github/workflows/ci_tests.yaml
index 59cbb91..5bad6c4 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -22,7 +22,7 @@ jobs:
           # x86 builds are only meaningful for Windows
           - os: windows-latest
             architecture: x86
-          - os: macos-latest
+          - os: macos-12
             architecture: x64
         python:
           - 3.8