diff --git a/requirements.txt b/requirements.txt
index 97a4a50..fa23bff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ jupyter-core==4.7.1
 jupyterlab-pygments==0.1.2
 jupyterlab-widgets==1.0.2
 kiwisolver==1.3.2
-lxml==4.6.3
+lxml==4.6.5
 MarkupSafe==2.0.1
 matplotlib==3.4.3
 matplotlib-inline==0.1.3