diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index 3e1dbca..5be0679 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -14,6 +14,8 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
+      - name: Checkout the source code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
       - name: PR validation
         uses: pagopa/mil-actions/pr-validation@main
         with: