diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5946fbc..d8b22c2 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-sphinx==8.2.1
+sphinx==9.1.0
 sphinx-design==0.6.1
 sphinx-copybutton==0.5.2
 furo==2025.9.25