Now depends on Kombu >= 0.9.0 (Up on PyPI)

contrib/requirements/default.txt

@@ -1,5 +1,5 @@
 python-dateutil
 sqlalchemy
 anyjson
-kombu
+kombu>=0.9.0
 pyparsing

setup.py

@@ -129,7 +129,7 @@ except ImportError:
 install_requires.extend([
     "python-dateutil",
     "anyjson",
-    "kombu",
+    "kombu>=0.9.0",
     "pyparsing",
 ])