diff --git a/requirements-docs.txt b/requirements-docs.txt
index ae25ce3..904bf9d 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -1,6 +1,6 @@
 myst-parser==5.0.0
 nbsphinx==0.9.8
-sphinx==9.0.4
+sphinx==9.1.0
 gitsphinx-autoapi==3.8.0
 sphinx-markdown-builder==0.6.10
 sphinx-copybutton==0.5.2