diff --git a/requirements.txt b/requirements.txt
index 4aad25b..f6b3431 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ jupyter-highlight-selected-word==0.2.0
 jupyter-latex-envs==1.4.4
 jupyter-nbextensions-configurator==0.4.0
 kiwisolver==1.0.1
-lxml==4.2.2
+lxml==4.6.3
 MarkupSafe==1.0
 matplotlib==2.2.2
 mistune==0.8.3