diff --git a/requirements.txt b/requirements.txt
index 704c1c3..889afee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,13 +1,16 @@
-Babel>=1.3
-eventlet>=0.13.0
-iso8601>=0.1.9
-jsonschema>=2.3.0
-oslo.config>=1.6.0
-oslo.serialization>=1.4.0,<2.0
-six>=1.5.2
-pbr>=0.7.0
-Jinja2
-stevedore>=0.15
-requests>=1.2.3
-urllib3>=1.7
-PyYAML==3.10
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+Babel>=1.3 # BSD
+eventlet!=0.18.3,>=0.18.2 # MIT
+iso8601>=0.1.9 # MIT
+jsonschema!=2.5.0,<3.0.0,>=2.0.0 # MIT
+oslo.config>=3.7.0 # Apache-2.0
+oslo.serialization>=1.10.0 # Apache-2.0
+six>=1.9.0 # MIT
+pbr>=1.6 # Apache-2.0
+Jinja2>=2.8 # BSD License (3 clause)
+stevedore>=1.5.0 # Apache-2.0
+requests!=2.9.0,>=2.8.1 # Apache-2.0
+urllib3>=1.8.3 # MIT
+PyYAML>=3.1.0 # MIT
diff --git a/setup.py b/setup.py
index cd38a49..782bb21 100644
--- a/setup.py
+++ b/setup.py
@@ -1,20 +1,29 @@
-#    Copyright 2014 Mirantis, Inc.
+# 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
+# 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
 #
-#         http://www.apache.org/licenses/LICENSE-2.0
+#    http://www.apache.org/licenses/LICENSE-2.0
 #
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
+# 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'],
+    setup_requires=['pbr>=1.8'],
     pbr=True)
diff --git a/test-requirements.txt b/test-requirements.txt
index 73895a5..16f0089 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,10 +1,13 @@
-hacking>=0.8.0,<0.9
-mock==1.0.1
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+hacking<0.9,>=0.8.0
+mock>=1.2 # BSD
+requests-mock>=0.7.0 # Apache-2.0
+unittest2 # BSD
 pytest>=2.7.2
 pytest-cov>=1.8.1
-requests-mock>=0.6
-unittest2==1.1.0
 
 # this is required for the docs build jobs
-sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
+sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2 # BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0