diff --git a/.github/workflows/github_action_build_docs.yml b/.github/workflows/github_action_build_docs.yml
index 1adea6660d..a96c8139de 100644
--- a/.github/workflows/github_action_build_docs.yml
+++ b/.github/workflows/github_action_build_docs.yml
@@ -22,6 +22,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+            fetch-depth: 0
+            submodules: true
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2