diff --git a/.github/workflows/update-test-matrix.yaml b/.github/workflows/update-test-matrix.yaml
index 26c63469..9d154c27 100644
--- a/.github/workflows/update-test-matrix.yaml
+++ b/.github/workflows/update-test-matrix.yaml
@@ -21,7 +21,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
+          python-version: "3.12.12"
 
       - name: Update test matrix
         run: python scripts/update-test-matrix.py