diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 9da81809..d6344387 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -9,6 +9,7 @@ jobs:
       - name: Install dependencies
         run: |
           pip install sphinx sphinx_rtd_theme sphinx-copybutton
+          pip install elevation_mapping_cupy/.
       - name: Sphinx build
         run: |
           sphinx-build docs/source docs/_build