diff --git a/requirements.txt b/requirements.txt
index 2c0121e..c143d92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ jupyter-contrib-nbextensions==0.5.1
 jupyter-highlight-selected-word==0.2.0
 jupyter-latex-envs==1.4.6
 jupyter-nbextensions-configurator==0.4.1
-lxml==4.5.1
+lxml==4.6.5
 MarkupSafe==1.1.1
 mistune==0.8.4
 nbconvert==5.6.1