diff --git a/requirements.txt b/requirements.txt
index 85b3956..242a1d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ easy-thumbnails==2.5
 environ==1.0
 future==0.16.0
 html5lib==1.0b10
-httplib2==0.10.3
+httplib2==0.18.0
 icalendar==4.0.1
 idna==2.6
 Jinja2==2.10