diff --git a/requirements.txt b/requirements.txt
index 08a3ca4..76bf2f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ jsondiff==1.1.1
 jsonnet==0.10.0
 jsonpickle==1.0
 kiwisolver==1.0.1
-lxml==4.3.0
+lxml==4.6.5
 MarkupSafe==1.1.0
 matplotlib==2.2.3
 mock==2.0.0