diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index f8d67aac..7835bacd
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ jellyfish==0.2.1
 jsonfield==1.0.3
 kombu==3.0.37
 lazy-object-proxy==1.4.3
-lxml==3.5.0
+lxml==4.6.3
 mccabe==0.6.1
 mock==2.0.0
 ndg-httpsclient==0.4.0