diff --git a/requirements.txt b/requirements.txt
index 19e5c9b..3c94b13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ gunicorn==19.9.0
 html5lib==1.0.1
 idna==2.8
 jmespath==0.9.4
-lxml==4.3.2
+lxml==4.6.5
 orcid==1.0.3
 Pillow==5.4.1
 psycopg2-binary==2.7.7