diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 8b01d9a..b6ac5ac 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -22,6 +22,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt 
+          pip install sphinx sphinx-rtd-theme
 
       - name: Build Sphinx documentation
         run: |