diff --git a/requirements.txt b/requirements.txt
index 65fb1535..de25f8d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,15 +1,15 @@
-pbr>=0.6,<1.0
-
+pbr>=0.6,!=0.7,<1.0
+argparse
 alembic>=0.4.1
 Babel>=1.3
-iso8601>=0.1.8
+iso8601>=0.1.9
 oauthlib>=0.6
-oslo.config>=1.2.0
-pecan>=0.2.0
+oslo.config>=1.2.1
+pecan>=0.4.5
 python-openid
 PyYAML>=3.1.0
 requests>=1.1
-six>=1.5.2
+six>=1.7.0
 SQLAlchemy>=0.8,<=0.8.99
 WSME>=0.6
 sqlalchemy-migrate>=0.8.2,!=0.8.4