diff --git a/requirements.txt b/requirements.txt
index aa77be839b..6c6aaa1f52 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,8 +21,8 @@ python-ceilometerclient>=1.0.3
 python-swiftclient>=1.5
 lxml>=2.3
 requests>=1.1
-six<1.4.0
-WSME>=0.5b2
+six
+WSME>=0.5b5
 PyYAML>=3.1.0
 -f http://tarballs.openstack.org/oslo.config/oslo.config-1.2.0a3.tar.gz#egg=oslo.config-1.2.0a3
 oslo.config>=1.2.0a3
diff --git a/setup.py b/setup.py
index 2a0786a8b2..70c2b3f32b 100755
--- a/setup.py
+++ b/setup.py
@@ -18,5 +18,5 @@
 import setuptools
 
 setuptools.setup(
-    setup_requires=['pbr>=0.5.21,<1.0'],
+    setup_requires=['pbr'],
     pbr=True)