-pbr>=1.8 # Apache-2.0
-PyYAML>=3.10.0 # MIT
-GitPython>=1.0.1 # BSD License (3 clause)
-keystoneauth1>=2.18.0 # Apache-2.0
-python-cinderclient!=1.7.0,!=1.7.1,>=1.6.0 # Apache-2.0
-python-glanceclient>=2.5.0 # Apache-2.0
-python-heatclient>=1.6.1 # Apache-2.0
-python-keystoneclient>=3.8.0 # Apache-2.0
-python-neutronclient>=5.1.0 # Apache-2.0
-python-novaclient!=7.0.0,>=6.0.0 # Apache-2.0
-requests!=2.12.2,>=2.10.0 # Apache-2.0
+# 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.
+pbr!=2.1.0 # Apache-2.0
+PyYAML # MIT
+requests!=2.20.0,!=2.24.0 # Apache-2.0