diff --git a/docs/requirements.txt b/docs/requirements.txt
index fc81d6d..87a5f4d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 # Documentation requirements for Sphinx
-sphinx>=7.1.0
+sphinx>=9.1.0
 sphinx-rtd-theme>=3.1.0
 myst-parser>=5.0.0
 sphinxcontrib-napoleon>=0.7