diff --git a/requirements-doc.txt b/requirements-doc.txt
index 797096ae0..3f868e21b 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -6,7 +6,7 @@
 cloud_sptheme
 jinja2<3.1  # fix sphinx failing, see: https://github.com/sphinx-doc/sphinx/issues/10291
 sphinx>=3.5,<6; python_version <= "3.7"
-sphinx>=6,<8; python_version >= "3.8"
+sphinx>=6,<7; python_version >= "3.8"
 sphinx-argparse
 sphinx-autoapi>=1.7.0
 sphinx-paramlinks>=0.4.1