maybe

docs/conf.py

@@ -28,7 +28,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ["sphinx.ext.intersphinx", "sphinx.ext.linkcode", "sphinx.ext.autosectionlabel"]
+extensions = ["sphinx.ext.intersphinx", "sphinx.ext.linkcode", "sphinx.ext.autosectionlabel", "furo"]
 
 intersphinx_mapping = {
     "python": ("https://docs.python.org/3/", None),