diff --git a/doc/source/requirements.txt b/doc/source/requirements.txt
index 433189e..9c05a5c 100644
--- a/doc/source/requirements.txt
+++ b/doc/source/requirements.txt
@@ -1,4 +1,4 @@
-lxml==6.0.4
+lxml==6.1.0
 importlib_metadata;python_version < '3.8'
 packaging
 Sphinx>=3