diff --git a/doc/requirements.txt b/doc/requirements.txt
index bced248..d669489 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -2,5 +2,5 @@ breathe==4.36.0
 exhale==0.3.7
 myst-parser==4.0.1
 myst-parser[linkify]
-sphinx==8.2.3
+sphinx==9.0.1
 sphinx-notfound-page==1.1.0