diff --git a/Pipfile b/Pipfile
old mode 100755
new mode 100644
index d3f355e..cc1262f
--- a/Pipfile
+++ b/Pipfile
@@ -21,7 +21,7 @@ httplib2 = ">=0.18.1"
 idna = "==2.9"
 itsdangerous = "==0.24"
 kombu = "==4.6.10"
-lxml = "==4.5.1"
+lxml = "==4.9.1"
 matplotlib = "==2.0.2"
 numpy = "==1.18.5"
 pandas = "==0.23.4"