diff --git a/app/requirements.txt b/app/requirements.txt
old mode 100755
new mode 100644
index d59f421..bcb0a62
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -76,7 +76,7 @@ Jinja2==2.9.6
 jmespath==0.9.3
 jsonfield==2.0.2
 kombu==4.1.0
-lxml==4.1.0
+lxml==4.9.1
 MarkupSafe==1.0
 msgpack-python==0.4.8
 ndg-httpsclient==0.4.3