diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index abee87b..0e35d55 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
     - uses: actions/checkout@v7
     - 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 }}
     - run: pip install -r requirements.txt