diff --git a/requirements.txt b/requirements.txt
index 90aad39..01f0417 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ jsonnet==0.13.0
 jsonpickle==1.2
 jsonschema==3.0.1
 kiwisolver==1.1.0
-lxml==4.3.3
+lxml==4.6.3
 MarkupSafe==1.1.1
 marshmallow==2.6.1
 marshmallow-jsonapi==0.15.1