diff --git a/requirements.txt b/requirements.txt
index 0fd4c82..2181710 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 argparse==1.2.1
 django-nose==1.4.5
 nose==1.2.1
-lxml==3.3.5
+lxml==4.9.1