diff --git a/_building/building-requirements.txt b/_building/building-requirements.txt
index bd303df..1f3338a 100644
--- a/_building/building-requirements.txt
+++ b/_building/building-requirements.txt
@@ -4,4 +4,4 @@ semantic_version>=2.9,<3.0
 jinja2>=3.0,<4.0
 PyYAML>=6.0,<7.0
 
-sphinx>=4.3,<6.0
+sphinx>=4.3,<7.0