diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 704da84..a34d897 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@v7
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v6.3.0
       - name: Install package
         run: pip install -e ".[test]"
       - name: Mypy
@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@v7
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@v6.3.0
         name: Setup Python ${{ matrix.python-version }}
         with:
           python-version: ${{ matrix.python-version }}