diff --git a/requirements.txt b/requirements.txt
index 197e801..d376039 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ colorama==0.3.2
 ecdsa==0.11
 html5lib==0.999
 logutils==0.3.3
-lxml==3.4.0
+lxml==4.9.1
 ndg-httpsclient==0.3.2
 numpy==1.8.2
 paramiko==1.15.1