diff --git a/requirements.txt b/requirements.txt
index 06aa9f3..ee754dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,7 @@
 anyjson
 nose
 httplib2>=0.7.0
+jsonschema>=1.0.0,!=1.4.0,<2
 testtools>=0.9.32
 lxml
 boto>=2.2.1