diff --git a/requirements.txt b/requirements.txt
index 81003e0..b382b61 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,10 +3,10 @@ pbr>=0.6,!=0.7,<1.0
 anyjson>=0.3.3
 argparse
 eventlet>=0.13.0
-python-keystoneclient>=0.7.0
+python-keystoneclient>=0.8.0
 python-heatclient>=0.2.3
 requests>=1.1
 iso8601>=0.1.9
 lxml>=2.3
 oslo.config>=1.2.0
-six>=1.5.2
+six>=1.6.0
diff --git a/setup.py b/setup.py
index 70c2b3f..7363757 100644
--- a/setup.py
+++ b/setup.py
@@ -17,6 +17,14 @@
 # THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
+# In python < 2.7.4, a lazy loading of package `pbr` will break
+# setuptools if some other modules registered functions in `atexit`.
+# solution from: http://bugs.python.org/issue15881#msg170215
+try:
+    import multiprocessing  # noqa
+except ImportError:
+    pass
+
 setuptools.setup(
     setup_requires=['pbr'],
     pbr=True)