diff --git a/requirements.txt b/requirements.txt
index 73fce60..323e3f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ futures==3.2.0
 html5lib==1.0b8
 httplib2==0.11.3
 hyperlink==17.3.1
-lxml==4.1.1
+lxml==4.6.3
 networkx==2.0
 nltk==3.2.5
 numpy>=1.14.1