diff --git a/docs/source/conf.py b/docs/source/conf.py
index 7734c9c48..af7f542bd 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -183,6 +183,6 @@ def filter_unwanted_leapp_types(app, what, name, obj, skip, options):
 
 def setup(app):
     app.connect('autodoc-skip-member', filter_unwanted_leapp_types)
-    app.add_stylesheet('css/asciinema-player.css')
-    app.add_stylesheet('css/custom.css')
-    app.add_javascript('js/asciinema-player.js')
+    app.add_css_file('css/asciinema-player.css')
+    app.add_css_file('css/custom.css')
+    app.add_js_file('js/asciinema-player.js')
diff --git a/requirements-docs.txt b/requirements-docs.txt
index 6e3a0a47a..f067d1930 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -5,5 +5,5 @@ sphinxcontrib-jquery
 docutils
 CommonMark
 myst-parser
-sphinx==3.5.4
+sphinx==4.5.0
 sphinx-autobuild