diff --git a/requirements.txt b/requirements.txt
index a21d15e..39840e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ itsdangerous==1.1.0
 Jinja2==2.11.2
 jsonschema==3.2.0
 kombu==4.6.8
-lxml==4.6.1
+lxml==4.9.1
 MarkupSafe==1.1.1
 mistune==0.8.4
 mongoengine==0.17.0