diff --git a/requirements.txt b/requirements.txt
index e81ec5e..f63048d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 tornado == 4.5.3
 gevent == 1.2.2
 gunicorn == 19.7.1
-lxml == 4.1.0
+lxml == 4.9.1
 requests == 2.18.4
 mysqlclient == 1.3.12
 sqlalchemy == 1.2.2