diff --git a/.github/workflows/validate_operations.yml b/.github/workflows/validate_operations.yml
index 18d93ad..4d6d72d 100644
--- a/.github/workflows/validate_operations.yml
+++ b/.github/workflows/validate_operations.yml
@@ -33,6 +33,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          github-server-url: https://chef.heaplab.deib.polimi.it/git
 
       - name: Install system dependencies
         run: |