diff --git a/requirements.txt b/requirements.txt
index 5bf3a0b..c4dafb7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ Flask==0.12
 google-api-python-client==1.7.4
 google-auth==1.5.1
 google-auth-httplib2==0.0.3
-httplib2==0.11.3
+httplib2==0.19.0
 itsdangerous==0.24
 Jinja2==2.9.5
 MarkupSafe==0.23