Use the latest Sphinx version

.github/workflows/docs.yml

@@ -12,16 +12,16 @@ jobs:
 
     steps:
     - uses: actions/checkout@v1
-    - name: Set up Python 3.7
+    - name: Set up Python 3.9
       uses: actions/setup-python@v1
       with:
-        python-version: 3.7
+        python-version: 3.9
     - name: Install dependencies
       run: |
         sudo apt install libpq-dev
         python -m pip install --upgrade pip
         pip install .
-        pip install "sphinx>=2.4,<3"
+        pip install "sphinx>=4.4,<5"
         pip install "cloud_sptheme>=1.10,<2"
     - name: Create docs with Sphinx
       run: |

docs/requirements.txt

@@ -1,2 +1,2 @@
-sphinx>=3.2,<4
+sphinx>=4.4,<5
 cloud_sptheme>=1.10,<2

tox.ini

@@ -12,7 +12,7 @@ commands =
 [testenv:docs]
 basepython = python3.9
 deps =
-    sphinx>=3.5,<4
+    sphinx>=4.4,<5
     cloud_sptheme>=1.10,<2
 commands =
     sphinx-build -b html -nEW docs docs/_build/html