diff --git a/docs/readthedocs/requirements.txt b/docs/readthedocs/requirements.txt
index e03cfae56b..4796a961e2 100644
--- a/docs/readthedocs/requirements.txt
+++ b/docs/readthedocs/requirements.txt
@@ -1,4 +1,4 @@
-Sphinx==8.2.3
+Sphinx==9.0.4
 sphinx-rtd-theme==3.0.2
 sphinxcontrib-plantuml==0.31
 myst-parser==4.0.1