diff --git a/requirements.txt b/requirements.txt
index b6d89f75..29001728 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-pbr>=0.6,<1.0
+pbr>=0.6,!=0.7,<1.0
 Babel>=1.3
-SQLAlchemy>=0.7.8,<=0.9.99
+SQLAlchemy>=0.7.8,!=0.9.5,<=0.9.99
 alembic>=0.4.1
 anyjson>=0.3.3
 eventlet>=0.13.0
@@ -13,9 +13,9 @@ ordereddict
 kombu>=2.4.8
 lockfile>=0.8
 pycrypto>=2.6
-psutil>=1.1.1
+psutil>=1.1.1,<2.0.0
 iso8601>=0.1.9
-six>=1.5.2
+six>=1.7.0
 netaddr>=0.7.6
 PyYAML>=3.1.0
 jsonpatch>=1.1
@@ -25,11 +25,11 @@ Paste
 
 passlib
 jsonschema>=2.0.0,<3.0.0
-python-keystoneclient>=0.7.0
-python-heatclient>=0.2.3
-python-neutronclient>=2.3.4,<3
-oslo.config>=1.2.0
-oslo.messaging>=1.3.0a9
+python-keystoneclient>=0.9.0
+python-heatclient>=0.2.9
+python-neutronclient>=2.3.5,<3
+oslo.config>=1.2.1
+oslo.messaging>=1.3.0
 
 # not listed in global requirements
 yaql>=0.2.2,<0.3