diff --git a/requirements.txt b/requirements.txt
index 54a658f..b261643 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ jedi==0.15.1
 jmespath==0.9.4
 jsonschema==2.6.0
 lazy-object-proxy==1.4.3
-lxml==4.6.1
+lxml==4.9.1
 Markdown==3.1.1
 mccabe==0.6.1
 mistune==0.8.4