diff --git a/requirements.txt b/requirements.txt
index e8e1989..a141176 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 sqlalchemy == 1.2.7
 flask == 1.0.2
-lxml == 4.6.3
+lxml == 4.9.1
 requests == 2.20.1