diff --git a/requirements.txt b/requirements.txt
index 02a6a0e..a3cf028 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ gunicorn==20.0.3
 httplib2==0.18.0
 idna==2.8
 importlib-metadata==1.2.0
-lxml==4.4.2
+lxml==4.9.1
 more-itertools==8.0.2
 multidict==4.6.1
 multitasking==0.0.9