diff --git a/requirements.txt b/requirements.txt
index f2ea463..1836cad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ jupyter-highlight-selected-word==0.2.0
 jupyter-latex-envs==1.4.6
 jupyter-nbextensions-configurator==0.4.1
 kiwisolver==1.2.0
-lxml==4.6.2
+lxml==4.6.3
 Mako==1.1.3
 MarkupSafe==1.1.1
 matplotlib==3.3.1