diff --git a/requirements.txt b/requirements.txt
index 026c3dab..77cd7123 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-pbr>=0.6,<1.0
+pbr>=0.6,!=0.7,<1.0
 Babel>=1.3
 argparse
 PrettyTable>=0.7,<0.8
-python-keystoneclient>=0.6.0
+python-keystoneclient>=0.7.0
 pyOpenSSL>=0.11
 warlock>=1.0.1,<2
diff --git a/setup.py b/setup.py
index 70c2b3f3..73637574 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)