diff --git a/.github/workflows/uml.yml b/.github/workflows/uml.yml
index 5fba97c6..b47b8168 100644
--- a/.github/workflows/uml.yml
+++ b/.github/workflows/uml.yml
@@ -19,6 +19,8 @@ jobs:
         uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref || 'main' }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
+
 
       - name: Set up Python
         uses: actions/setup-python@v2