diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index ce1f90a..7365208
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ cssselect==1.0.3
 google-api-python-client==1.7.8
 google-auth-httplib2==0.0.3
 google-auth-oauthlib==0.3.0
-httplib2==0.12.1
+httplib2==0.19.0
 lxml==4.1.0
 pytz==2018.5
 requests==2.21.0