diff --git a/.github/workflows/license-headers.yml b/.github/workflows/license-headers.yml
index 6c7394c..25f57f5 100644
--- a/.github/workflows/license-headers.yml
+++ b/.github/workflows/license-headers.yml
@@ -14,6 +14,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - name: Check per-file license headers
         run: python scripts/check_license_headers.py