diff --git a/docs/readthedocs/requirements.txt b/docs/readthedocs/requirements.txt
index 538bf233..ef84ab52 100644
--- a/docs/readthedocs/requirements.txt
+++ b/docs/readthedocs/requirements.txt
@@ -1,3 +1,3 @@
 myst-parser==4.0.1
-Sphinx==8.2.3
+Sphinx==9.0.4
 sphinx-rtd-theme==3.0.2