diff --git a/requirements-dev.txt b/requirements-dev.txt
index 29700767..5fbba934 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,8 +3,8 @@
 tox==4.34.1 ; python_version >= "3.10"
 tox==4.34.1 ; python_version < "3.10"
 wheel==0.46.1
-Sphinx==9.0.4 ; python_version >= "3.11"
-Sphinx==7.4.7 ; python_version < "3.11"
+Sphinx==9.1.0 ; python_version >= "3.11"
+Sphinx==9.1.0 ; python_version < "3.11"
 sphinx-rtd-theme==3.1.0 ; python_version >= "3.11"
 sphinx-rtd-theme==3.1.0 ; python_version < "3.11"
 pypandoc==1.16.2