diff --git a/docs/conf.py b/docs/conf.py
index 2cb5a10..520c101 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -35,7 +35,6 @@ extensions = [
     'sphinx.ext.viewcode',
     'alabaster',
     'sphinx_issues',
-    'versionwarning.extension',
 ]
 
 primary_domain = 'py'
@@ -101,19 +100,3 @@ html_sidebars = {
     '**': ['about.html', 'donate.html', 'useful-links.html',
            'localtoc.html', 'relations.html', 'searchbox.html']
 }
-
-# sphinx-version-warning config
-versionwarning_messages = {
-    'latest': 'This document is for the development version. For the stable version documentation, see <a href="/en/stable/">here</a>.',
-    'stable': 'This document is for the latest stable release. For the 3.0 pre-release documentation, see <a href="/en/3.0/">here</a>.',
-    '3.0': 'This document is for the latest 3.0 pre-release. For the 2.x documentation, see <a href="/en/2.x-line/">here</a>.',
-    '2.x-line': 'This document is for the 2.x release branch. For the 3.0 pre-release documentation, see <a href="/en/3.0/">here</a>.',
-}
-# Show warning at top of page
-versionwarning_body_selector = 'div.document'
-# For debugging locally
-# versionwarning_project_version = '3.0'
-
-# https://docs.readthedocs.io/en/latest/guides/adding-custom-css.html
-def setup(app):
-    app.add_stylesheet('css/versionwarning.css')