diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 002fced..b0bfd28 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     container: pypy:${{ matrix.python-version }}
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - run: pypy --version
       - run: pip install -r requirements.txt
       - run: |