diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index ba8ae64..2f7eec5 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Setup Python
         uses: actions/setup-python@v4
         with: