diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index ce1f90a..2b96be2
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ google-api-python-client==1.7.8
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.3.0
 httplib2==0.12.1
-lxml==4.1.0
+lxml==4.6.5
 pytz==2018.5
 requests==2.21.0
 urllib3==1.24.1