diff --git a/requirements.txt b/requirements.txt
index a356194..411b9ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ idna==2.7
 itsdangerous==0.24
 Jinja2==2.10
 jsonschema==2.6.0
-lxml==4.2.4
+lxml==4.9.1
 MarkupSafe==1.0
 money==1.3.0
 monotonic==1.5