diff --git a/docs/requirements.txt b/docs/requirements.txt
index e0ea5aa4..472fcc28 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,9 @@
 -r ../requirements.txt
 
 alabaster_jupyterhub
-autodoc-traits
+# Temporary fix of #3021. Revert back to released autodoc-traits when
+# 0.1.0 released.
+https://github.com/jupyterhub/autodoc-traits/archive/75885ee24636efbfebfceed1043459715049cd84.zip
 pydata-sphinx-theme
 recommonmark>=0.6
 sphinx-copybutton
diff --git a/docs/source/conf.py b/docs/source/conf.py
index fd0d4b92..64e4939a 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -20,6 +20,7 @@ extensions = [
     'autodoc_traits',
     'sphinx_copybutton',
     'sphinx-jsonschema',
+    'recommonmark',
 ]
 
 templates_path = ['_templates']
@@ -62,12 +63,10 @@ from recommonmark.transform import AutoStructify
 
 def setup(app):
     app.add_config_value('recommonmark_config', {'enable_eval_rst': True}, True)
-    app.add_stylesheet('custom.css')
+    app.add_css_file('custom.css')
     app.add_transform(AutoStructify)
 
 
-source_parsers = {'.md': 'recommonmark.parser.CommonMarkParser'}
-
 source_suffix = ['.rst', '.md']
 # source_encoding = 'utf-8-sig'