diff --git a/lower-constraints.txt b/lower-constraints.txt
index 4b18d16..47941e4 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -1,8 +1,8 @@
 appdirs==1.3.0
-Babel==2.3.4
+Babel==2.5.3
 cliff==2.8.0
 cmd2==0.8.0
-coverage==4.0
+coverage==4.5.1
 debtcollector==1.2.0
 decorator==3.4.0
 deprecation==1.0
@@ -29,15 +29,15 @@ os-service-types==1.2.0
 osc-lib==1.8.0
 oslo.i18n==3.15.3
 oslo.utils==3.33.0
-oslotest==3.2.0
-pbr==2.0.0
+oslotest==3.3.0
+pbr==3.1.1
 pep8==1.5.7
 prettytable==0.7.2
 pyflakes==0.8.1
 pyparsing==2.1.0
 pyperclip==1.5.27
 python-mimeparse==1.6.0
-python-subunit==1.0.0
+python-subunit==1.2.0
 pytz==2013.6
 PyYAML==3.12
 requests==2.14.2
@@ -46,8 +46,8 @@ simplejson==3.5.1
 six==1.10.0
 stevedore==1.20.0
 testrepository==0.0.18
-testscenarios==0.4
-testtools==2.2.0
+testscenarios==0.5.0
+testtools==2.3.0
 traceback2==1.4.0
 unittest2==1.1.0
 wrapt==1.7.0
diff --git a/requirements.txt b/requirements.txt
index 5121058..07f4d7d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,12 +2,12 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
-Babel!=2.4.0,>=2.3.4 # BSD
+pbr>=3.1.1 # Apache-2.0
+Babel>=2.5.3 # BSD
 cliff!=2.9.0,>=2.8.0 # Apache-2.0
 osc-lib>=1.8.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 keystoneauth1>=3.4.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
 networkx>=2.3;python_version>='3.4'  # BSD
-pydot>=1.4.1 # BSD
+pydot>=1.4.1 # BSD
\ No newline at end of file
diff --git a/test-requirements.txt b/test-requirements.txt
index e293ce9..b02bc41 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,11 +3,10 @@
 # process, which may cause wedges in the gate later.
 
 hacking>=1.1.0 # Apache-2.0
-
-coverage!=4.4,>=4.0 # Apache-2.0
-python-subunit>=1.0.0 # Apache-2.0/BSD
-oslotest>=3.2.0 # Apache-2.0
+coverage>=4.5.1 # Apache-2.0
+python-subunit>=1.2.0 # Apache-2.0/BSD
+oslotest>=3.3.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
-testscenarios>=0.4 # Apache-2.0/BSD
-testtools>=2.2.0 # MIT
+testscenarios>=0.5.0 # Apache-2.0/BSD
+testtools>=2.3.0 # MIT
 mock>=2.0.0 # BSD