diff --git a/.github/workflows/master-slugs.yml b/.github/workflows/master-slugs.yml
index 71e8a4097..c9f3d07c9 100644
--- a/.github/workflows/master-slugs.yml
+++ b/.github/workflows/master-slugs.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          submodules: true
+          submodules: "recursive"
       - name: Setup Python
         uses: actions/setup-python@v5
         id: setup_python