diff --git a/.github/workflows/format-code.yml b/.github/workflows/format-code.yml
index bdea96f..7880940 100644
--- a/.github/workflows/format-code.yml
+++ b/.github/workflows/format-code.yml
@@ -8,7 +8,7 @@ jobs:
   format-code:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
       - uses: ministryofjustice/github-actions/code-formatter@v14
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}