diff --git a/docs/conf.py b/docs/conf.py
index a3f407909a8f4e..96e8290455e20c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -78,8 +78,6 @@
     ('py:exc', 'BadOperationException'),
     ('py:exc', 'Exception'),
     ('py:exc', 'ValueError'),
-    ('py:class', 'integer -- return number of occurrences of value'),
-    ('py:class', 'integer -- return first index of value.'),
     ('py:class', 'http.client.HTTPMessage')
 ]
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index dafe2e97d21858..a1abe2892e249c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
 recommonmark==0.6.0
-# pin this to the last Py2 release
-Sphinx==3.3.1  # pyup: <2.0
+# Pin this to the same major version as https://docs.python.org/3/
+Sphinx==2.4.4  # pyup: <2.0
 sphinx-argparse==0.2.5