diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3cd7d1f..e5e77ac 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout main
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           repository: 'hedgedoc/hedgedoc'
           ref: 'master'