diff --git a/requirements.txt b/requirements.txt
index 24aa4c8..e5e3731 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ ipaddress==1.0.16
 iso3166==0.7
 itsdangerous==0.24
 Jinja2==2.8
-lxml==3.4.4
+lxml==4.6.2
 MarkupSafe==0.23
 ndg-httpsclient==0.4.0
 numpy==1.9.3