diff --git a/requirements-dev.txt b/requirements-dev.txt
index f19c50e..e190a6a 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -20,7 +20,7 @@ commitizen==4.11.0
 deprecated==1.3.1 # for commitizen
 
 # Sphinx
-sphinx==8.2.3
+sphinx==9.1.0
 sphinx_rtd_theme==3.0.2
 sphinx-tabs==3.4.7
 GitPython==3.1.46