diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 01ccbb76..a67d8630
--- a/requirements.txt
+++ b/requirements.txt
@@ -80,7 +80,7 @@ jellyfish==0.2.1
 jsonfield==1.0.3
 kombu==3.0.37
 lazy-object-proxy==1.4.3
-lxml==3.5.0
+lxml==4.6.2
 mccabe==0.6.1
 mock==2.0.0
 ndg-httpsclient==0.4.0