Now depends on Kombu 2.1.6

requirements/default.txt

@@ -1,3 +1,3 @@
 billiard>=2.7.3.2
 python-dateutil>=1.5,<2.0
-kombu>=2.1.5,<3.0
+kombu>=2.1.6,<3.0

setup.cfg

@@ -44,5 +44,5 @@ requires = uuid
            importlib
            billiard>=2.7.3.2
            python-dateutil >= 1.5
-           kombu >= 2.1.5
+           kombu >= 2.1.6
            ordereddict