diff --git a/requirements.txt b/requirements.txt
index a4013b0..57887e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-httplib2==0.12.0
+httplib2==0.18.0
 google-auth-httplib2==0.0.3
 google-api-python-client==1.7.9
 google-auth==1.6.2