diff --git a/.github/workflows/version-sync.yml b/.github/workflows/version-sync.yml
index b4006ea..d182f8c 100644
--- a/.github/workflows/version-sync.yml
+++ b/.github/workflows/version-sync.yml
@@ -26,7 +26,7 @@ jobs:
           path: _github
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           python-version: ${{ inputs.python-version }}