diff --git a/docs/requirements.txt b/docs/requirements.txt
index e64d619b..3f771e51 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 furo==2025.9.25
-sphinx==8.1.3
+sphinx==9.0.4
 sphinx-click==6.1.0
 myst_parser==4.0.1
 sphinx-mermaid==0.0.8