diff --git a/packaging/rpm/python-synergy-scheduler-manager.spec b/packaging/rpm/python-synergy-scheduler-manager.spec
index 971db0a..4fe9f1f 100644
--- a/packaging/rpm/python-synergy-scheduler-manager.spec
+++ b/packaging/rpm/python-synergy-scheduler-manager.spec
@@ -12,13 +12,13 @@ BuildArch:     noarch
 BuildRequires: python-devel
 BuildRequires: python-setuptools
 Requires:      python-nova >= 12.0
-Requires:      python-oslo-config >= 2.4
-Requires:      python-oslo-messaging >= 2.5
-Requires:      python-oslo-serialization >= 1.9
-Requires:      python-oslo-versionedobjects >= 0.10
-Requires:      python-pbr >= 1.8
-Requires:      python-requests >= 2.10
-Requires:      python-sqlalchemy >= 1.0
+Requires:      python-oslo-config
+Requires:      python-oslo-messaging
+Requires:      python-oslo-serialization
+Requires:      python-oslo-versionedobjects
+Requires:      python-pbr
+Requires:      python-requests
+Requires:      python-sqlalchemy
 Requires:      python-synergy-service >= 1.1
 
 
diff --git a/requirements.txt b/requirements.txt
index bdac3a4..2ddbe69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,12 +2,12 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.8,<1.9
+pbr
 
-oslo.config>=2.4,<2.5
-oslo.messaging>=2.5,<2.6
-oslo.serialization>=1.9,<1.10
-oslo.versionedobjects>=0.10,<0.11
-requests>=2.0.0,<3.0.0  # availability: 2.10.0 on CentOS 7, 2.7.0 on Ubuntu 14.04
-sqlalchemy>=1.0,<1.1
+oslo.config
+oslo.messaging
+oslo.serialization
+oslo.versionedobjects
+requests
+sqlalchemy
 synergy-service>=1.1,<1.2
diff --git a/setup.py b/setup.py
index f06a663..3ffe9b5 100644
--- a/setup.py
+++ b/setup.py
@@ -23,5 +23,5 @@ except ImportError:
     pass
 
 setuptools.setup(
-    setup_requires=['pbr>=1.8', 'setuptools'],
+    setup_requires=['pbr', 'setuptools'],
     pbr=True)