diff --git a/python39.changes b/python39.changes
index 0a91ffc..f70908a 100644
--- a/python39.changes
+++ b/python39.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Jan 13 12:06:59 UTC 2023 - Martin Liška <mliska@suse.cz>
+
+- Suppress warnings for Sphinx 6.0+.
+
 -------------------------------------------------------------------
 Thu Dec  8 10:43:43 UTC 2022 - Matej Cepl <mcepl@suse.com>
 
diff --git a/python39.spec b/python39.spec
index 66fbfed..6905740 100644
--- a/python39.spec
+++ b/python39.spec
@@ -1,7 +1,7 @@
 #
 # spec file
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -458,7 +458,14 @@ TODAY_DATE=`date -r %{SOURCE0} "+%%B %%d, %%Y"`
 
 cd Doc
 sed -i "s/^today = .*/today = '$TODAY_DATE'/" conf.py
+
+%if 0%{?suse_version} >= 1550
+# Sphinx 6.0+ reports various warnings that are not backported
+# branch.
+%make_build html SPHINXERRORHANDLING=""
+%else
 %make_build -j1 html
+%endif
 
 # Build also devhelp files
 sphinx-build -a -b devhelp . build/devhelp