diff --git a/dev-requirements.txt b/dev-requirements.txt
index c1e3e35eb8..efc95e72e3 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -196,7 +196,7 @@ sniffio==1.3.1
 snowballstemmer==3.0.1
 soupsieve==2.8
 sparse==0.17.0
-Sphinx==8.2.3
+Sphinx==9.0.4
 sphinx-autobuild==2025.8.25
 sphinx-click==6.1.0
 sphinx-copybutton==0.5.2