diff --git a/requirements.txt b/requirements.txt
index e815aa4b00c..e16783e9af1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -384,7 +384,7 @@ sortedcontainers==2.4.0
     # via hypothesis
 soupsieve==2.8.3
     # via beautifulsoup4
-sphinx==8.2.3
+sphinx==9.1.0
     # via
     #   qcodes (pyproject.toml)
     #   autodocsumm