diff --git a/requirements.txt b/requirements.txt
index 2412d12..77e6718 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ jsbeautifier==1.6.14
 jsonschema==2.6.0
 jupyter-core==4.3.0
 lazy-object-proxy==1.3.1
-lxml==3.8.0
+lxml==4.6.3
 MarkupSafe==1.0
 mccabe==0.6.1
 natsort==5.1.0