diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 137f74b72c..d4ec20061b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -86,7 +86,7 @@ jobs:
       - name: Install base dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install tox sphinx
+          python -m pip install tox 'sphinx<4.4.0'
 
       - name: Add problem matcher
         run: echo "::add-matcher::.github/sphinx-problem-matcher.json"