diff --git a/requirements.txt b/requirements.txt
index e16dcc0..73ca3ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ future==0.16.0
 gunicorn==19.7.1
 html5lib==0.999999999
 idna==2.5
-lxml==3.8.0
+lxml==4.6.2
 markdown2==2.3.4
 Naked==0.1.31
 olefile==0.44