diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0ec5369..66bc46f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,5 +8,5 @@ flake8>=6.0.0
 pre-commit>=3.0.0
 tox>=4.0.0
 coverage>=7.0.0
-sphinx>=5.0.0
+sphinx>=9.1.0
 sphinx-rtd-theme>=1.2.0
\ No newline at end of file