diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 4a3c3e1..b4e5d69 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v6.3.0
       with:
         python-version: 3
     - name: Install dependencies
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 9fc0543..e746210 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -54,7 +54,7 @@ jobs:
         uses: astral-sh/setup-uv@v8.2.0
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v6.3.0
         with:
           python-version: ${{ matrix.python-version }}