diff --git a/requirements.txt b/requirements.txt
index 1e53145..fa31a25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ Jinja2==2.8
 Keras==2.1.2
 language-selector==0.1
 louis==2.6.4
-lxml==3.5.0
+lxml==4.6.5
 Mako==1.0.3
 Markdown==2.6.9
 MarkupSafe==0.23