diff --git a/doc/requirements.txt b/doc/requirements.txt
index 3eafcfdc3d..bbce483823 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,5 +1,5 @@
 PyQt6==6.10.1
-sphinx==8.2.3
+sphinx==9.1.0
 pydata-sphinx-theme==0.16.1
 sphinx-design==0.6.1
 sphinxcontrib-images==1.0.1