diff --git a/python-marshmallow.changes b/python-marshmallow.changes
index cc6f049..532953e 100644
--- a/python-marshmallow.changes
+++ b/python-marshmallow.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Mar 15 14:54:45 UTC 2023 - Matej Cepl <mcepl@suse.com>
+
+- We want "modern" Sphinx on SLE-15, not the 3.6-based one.
+
 -------------------------------------------------------------------
 Fri Dec  2 20:31:35 UTC 2022 - Yogalakshmi Arunachalam <yarunachalam@suse.com>
 
diff --git a/python-marshmallow.spec b/python-marshmallow.spec
index ab79d8a..fc05671 100644
--- a/python-marshmallow.spec
+++ b/python-marshmallow.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-marshmallow
 #
-# 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
@@ -37,10 +37,17 @@ Suggests:       python-python-dateutil
 Suggests:       python-simplejson
 BuildArch:      noarch
 # SECTION doc build requirements
+%if 0%{?suse_version} == 1500 && %{?sle_version} >= 150400
+BuildRequires:  %{python_module Sphinx}
+BuildRequires:  %{python_module alabaster}
+BuildRequires:  %{python_module sphinx-issues}
+BuildRequires:  %{python_module sphinx-version-warning}
+%else
 BuildRequires:  python3-Sphinx
 BuildRequires:  python3-alabaster
 BuildRequires:  python3-sphinx-issues
 BuildRequires:  python3-sphinx-version-warning
+%endif
 # /SECTION
 # SECTION test requirements
 BuildRequires:  %{python_module pytest}
@@ -66,7 +73,7 @@ HTML Documentation and examples for %{name}.
 
 %build
 %python_build
-sphinx-build-%{python3_bin_suffix} docs/ docs/_build/html
+sphinx-build docs/ docs/_build/html
 rm -r docs/_build/html/.buildinfo docs/_build/html/.doctrees
 
 %install