diff --git a/requirements.txt b/requirements.txt
index c48765e69cd..f4dbf4bb939 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -381,7 +381,7 @@ sortedcontainers==2.4.0
     # via hypothesis
 soupsieve==3.0.3
     # via beautifulsoup4
-sphinx==8.2.3
+sphinx==9.1.1
     # via
     #   qcodes (pyproject.toml)
     #   autodocsumm