diff --git a/requirements.txt b/requirements.txt
index bdabc005..88a559a2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ ipaddress==1.0.16
 itsdangerous==0.24
 Jinja2==2.8
 keen==0.5.1
-lxml==3.8.0
+lxml==4.9.1
 MarkupSafe==0.23
 ndg-httpsclient==0.4.0
 pbr==3.1.1