diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d16b4f5..f91af21 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
       - uses: actions/setup-python@v4
         id: setup-python
         with:
-          python-version: "3.11"
+          python-version: "3.8"
       - name: Retrieve pre-built distribution files
         uses: actions/download-artifact@v3
         with: { name: python-distribution-files, path: dist/ }
diff --git a/docs/conf.py b/docs/conf.py
index 5d2c39f..dc1d792 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -74,8 +74,6 @@
     "sphinx.ext.napoleon",
     "nbsphinx",
 ]
-# https://nbsphinx.readthedocs.io/en/0.2.7/allow-errors.html
-nbsphinx_allow_errors = True
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]