diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index 73f4c4c..f85a341 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -30,6 +30,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
       - name: Install doxygen
         run: sudo apt install -y doxygen
       - name: Generate doxygen