diff --git a/requirements.txt b/requirements.txt
index 360ffc1..fe2f7ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ inflection==0.3.1
 itsdangerous==1.1.0
 Jinja2==2.11.1
 jsonschema==3.2.0
-lxml==4.5.0
+lxml==4.9.1
 MarkupSafe==1.1.1
 more-itertools==8.2.0
 multidict==4.7.5