diff --git a/docs/requirements.txt b/docs/requirements.txt
index 255ae9f..3f7b68d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -22,7 +22,7 @@ jsonschema==3.2.0
 jupyter-client==6.1.7
 jupyter-core==4.11.2
 jupyterlab-pygments==0.1.2
-lxml==4.9.1
+lxml==6.1.0
 MarkupSafe==1.1.1
 mistune==2.0.3
 nbclient==0.5.1