diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a1e28f1..59dfd3c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - uses: actions/setup-python@v6
         with:
           python-version: '3.14'