diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 73c9130..3e5d6d0 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -34,6 +34,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Build documentation
         run: |
+          pip install -r requirements.txt
           sphinx-build -M html ./docs/source _build/
       - name: Setup Pages
         uses: actions/configure-pages@v5