diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 72ecf965..fbe5f4c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,4 +12,10 @@ jobs:
       - uses: actions/checkout@v3
       - name: Run a one-line script
         run: ./ci.sh
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v3
+      - name: Run a one-line script
+        shell: bash
+        run: ./ci.sh