diff --git a/requirements.txt b/requirements.txt
index f444308..1bfd829 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ Flask-Session==0.3.0
 Flask-Via==2015.1.1
 google-api-python-client==1.6.1
 gunicorn==19.7.0
-httplib2==0.9.2
+httplib2==0.19.0
 hyperlink==17.1.1
 icalendar==3.11.2
 idna==2.5