diff --git a/requirements.txt b/requirements.txt
index a014363..27a0792 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ future==0.14.3
 gunicorn==19.3.0
 httplib2==0.9.1
 icalendar==3.9.0
-kombu
+kombu>=3.0.36,<3.1
 mercurial==3.4.1
 oauth2client==1.4.11
 pyasn1==0.1.7