diff --git a/requirements.txt b/requirements.txt
index b6286b4..c4f070c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ ggplot==0.4.5
 html2text==3.200.3
 html5lib==0.999
 jinja2==2.7.1
-lxml==3.2.4
+lxml==4.6.5
 matplotlib==1.3.1
 mechanize==0.2.5
 mock==1.0.1