diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eea436a8..6584aa1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-12]
         python-ver: [3.8, 3.9]
         experimental: [false]
         include:
@@ -16,7 +16,7 @@ jobs:
             os: ubuntu-latest
             experimental: true
           - python-ver: '3.10'
-            os: macos-latest
+            os: macos-12
             experimental: true
           - python-ver: '3.10'
             os: windows-latest
@@ -25,7 +25,7 @@ jobs:
             os: ubuntu-latest
             experimental: true
           - python-ver: 3.11
-            os: macos-latest
+            os: macos-12
             experimental: true
           - python-ver: 3.11
             os: windows-latest