diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index b0e5366..996875f 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -13,7 +13,8 @@ jobs:
       - uses: actions/setup-python@v5
       - name: Install dependencies
         run: |
-          pip install sphinx sphinx_rtd_theme myst_parser
+          pip install poetry
+          poetry install
       - name: Sphinx build
         run: |
           sphinx-build docs _build