diff --git a/requirements.txt b/requirements.txt
index 84f1c29b0b..fcb6755994 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 pbr>=2.0.0 # Apache-2.0
-SQLAlchemy>=1.0.10 # MIT
+SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
 decorator>=3.4.0 # BSD
 eventlet!=0.18.3,>=0.18.2 # MIT
 Jinja2!=2.9.0,!=2.9.1,!=2.9.2,!=2.9.3,!=2.9.4,>=2.8 # BSD License (3 clause)
@@ -21,7 +21,7 @@ sqlalchemy-migrate>=0.9.6 # Apache-2.0
 netaddr!=0.7.16,>=0.7.13 # BSD
 netifaces>=0.10.4 # MIT
 paramiko>=2.0 # LGPLv2.1+
-Babel>=2.3.4 # BSD
+Babel!=2.4.0,>=2.3.4 # BSD
 enum34;python_version=='2.7' or python_version=='2.6' or python_version=='3.3' # BSD
 iso8601>=0.1.11 # MIT
 jsonschema!=2.5.0,<3.0.0,>=2.0.0 # MIT
@@ -55,7 +55,7 @@ psutil>=3.2.2 # BSD
 oslo.versionedobjects>=1.17.0 # Apache-2.0
 os-brick>=1.8.0 # Apache-2.0
 os-vif>=1.4.0 # Apache-2.0
-os-win>=1.4.0 # Apache-2.0
+os-win>=2.0.0 # Apache-2.0
 castellan>=0.4.0 # Apache-2.0
 microversion-parse>=0.1.2 # Apache-2.0
 os-xenapi>=0.1.1 # Apache-2.0