diff --git a/requirements.txt b/requirements.txt
index 04942d2..58c94fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ Jinja2==2.10
 jmespath==0.9.3
 jsondiff==1.1.1
 jsonpickle==1.1
-lxml==4.3.2
+lxml==4.9.1
 MarkupSafe==1.1.0
 mock==2.0.0
 more-itertools==6.0.0