diff --git a/setup.cfg b/setup.cfg
index 4069364..b5ef7e2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -71,7 +71,7 @@ dev =
     pytest-xdist~=3.3.1
     pre-commit~=3.3.3
     detect-secrets~=1.5.0
-    sphinx~=8.2.3
+    sphinx~=9.1.0
     sphinx-rtd-theme~=3.0.2
     sphinxcontrib-googleanalytics~=0.5
     tox~=4.11.0