diff --git a/.github/workflows/test-src-build-macos.yml b/.github/workflows/test-src-build-macos.yml
index 98a5f2b2..d2dc9399 100644
--- a/.github/workflows/test-src-build-macos.yml
+++ b/.github/workflows/test-src-build-macos.yml
@@ -61,6 +61,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
       - name: Install libheif from formula
         run: |
           brew uninstall --force --ignore-dependencies imagemagick libheif
@@ -113,6 +116,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
       - name: Transform to Pi-Heif
         run: |
           cp -r -v ./pi-heif/* .