diff --git a/requirements.txt b/requirements.txt
index 3f73ac8dc759..a50e1b54e2be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,8 +21,8 @@ PrettyTable<0.8,>=0.7 # BSD
 sqlalchemy-migrate>=0.9.6 # Apache-2.0
 netaddr!=0.7.16,>=0.7.12 # BSD
 netifaces>=0.10.4 # MIT
-paramiko>=1.16.0 # LGPL
-Babel!=2.3.0,!=2.3.1,!=2.3.2,!=2.3.3,>=1.3 # BSD
+paramiko>=2.0 # LGPL
+Babel>=2.3.4 # BSD
 iso8601>=0.1.11 # MIT
 jsonschema!=2.5.0,<3.0.0,>=2.0.0 # MIT
 python-cinderclient>=1.6.0 # Apache-2.0
@@ -31,7 +31,7 @@ python-neutronclient>=4.2.0 # Apache-2.0
 python-glanceclient>=2.0.0 # Apache-2.0
 requests!=2.9.0,>=2.8.1 # Apache-2.0
 six>=1.9.0 # MIT
-stevedore>=1.9.0 # Apache-2.0
+stevedore>=1.10.0 # Apache-2.0
 setuptools>=16.0 # PSF/ZPL
 websockify>=0.6.1 # LGPLv3
 oslo.cache>=1.5.0 # Apache-2.0
@@ -51,7 +51,7 @@ oslo.service>=1.0.0 # Apache-2.0
 rfc3986>=0.2.0 # Apache-2.0
 oslo.middleware>=3.0.0 # Apache-2.0
 psutil<2.0.0,>=1.1.1 # BSD
-oslo.versionedobjects>=1.5.0 # Apache-2.0
+oslo.versionedobjects!=1.9.0,>=1.5.0 # Apache-2.0
 os-brick>=1.3.0 # Apache-2.0
 os-win>=0.2.3 # Apache-2.0
 castellan>=0.3.1 # Apache-2.0