Update requirements

Change-Id: I9648255a9bed8c75902763cbcf02ec2638fabcbd
diff --git a/setup.py b/setup.py
index 98b93eb..566d844 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,5 @@
+# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -23,5 +25,5 @@
     pass
 
 setuptools.setup(
-    setup_requires=['pbr'],
+    setup_requires=['pbr>=2.0.0'],
     pbr=True)