diff --git a/lower-constraints.txt b/lower-constraints.txt
index 256c9c7a..06ede287 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -2,9 +2,6 @@ alabaster==0.7.10
 alembic==0.8.10
 amqp==2.1.1
 appdirs==1.4.3
-astroid==1.6.5
-bandit==1.1.0
-bashate==0.5.1
 beautifulsoup4==4.6.0
 cachetools==2.0.0
 cffi==1.14.0
@@ -19,18 +16,16 @@ deprecation==1.0
 docutils==0.11
 dogpile.cache==0.8.0
 dulwich==0.15.0
-eventlet==0.21.0
+eventlet==0.22.0
 extras==1.0.0
 fasteners==0.7.0
 fixtures==3.0.0
-flake8-import-order==0.12
-flake8==2.6.2
 future==0.16.0
 futurist==1.2.0
 gitdb==0.6.4
 GitPython==1.0.1
 greenlet==0.4.15
-hacking==1.1.0
+hacking==3.2.0
 httplib2==0.9.1
 imagesize==0.7.1
 iso8601==0.1.11
@@ -47,10 +42,9 @@ logilab-common==1.4.1
 logutils==0.3.5
 Mako==0.4.0
 MarkupSafe==1.1.1
-mccabe==0.2.1
 monotonic==0.6
 mox3==0.20.0
-msgpack-python==0.4.0
+msgpack==0.5.0
 munch==2.1.0
 netaddr==0.7.18
 netifaces==0.10.4
@@ -93,12 +87,9 @@ positional==1.2.1
 prettytable==0.7.2
 psutil==3.2.2
 pycadf==1.1.0
-pycodestyle==2.4.0
 pycparser==2.18
-pyflakes==0.8.1
 Pygments==2.2.0
 pyinotify==0.9.6
-pylint==1.9.2
 PyMySQL==0.7.6
 pyparsing==2.1.0
 pyperclip==1.5.27
@@ -111,7 +102,7 @@ python-mimeparse==1.6.0
 python-neutronclient==6.7.0
 python-novaclient==9.1.0
 python-subunit==1.0.0
-pytz==2013.6
+pytz==2015.7
 PyYAML==3.13
 repoze.lru==0.7
 requests==2.14.2
diff --git a/requirements.txt b/requirements.txt
index 9caccef8..d45877f1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,13 +2,13 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=2.0 # Apache-2.0
-eventlet!=0.18.3,>=0.18.2,!=0.20.1,!=0.21.0,!=0.23.0
-msgpack>=0.3.0  # RPC library, BGP speaker(net_cntl)
+pbr>=2.0.0 # Apache-2.0
+eventlet>=0.22.0,!=0.23.0 # MIT
+msgpack>=0.5.0  # RPC library, BGP speaker(net_cntl)
 netaddr>=0.7.18 # BSD
 oslo.config>=5.1.0
-ovs>=2.6.0  # OVSDB
+ovs>=2.8.0  # OVSDB
 Routes>=2.3.1 # MIT
-six>=1.4.0
+six>=1.10.0
 tinyrpc>=0.6  # RPC library, BGP speaker(net_cntl)
-webob>=1.2  # wsgi
+WebOb>=1.8.2  # wsgi
diff --git a/test-requirements.txt b/test-requirements.txt
index f429a7f2..6edf030c 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,10 +5,10 @@
 hacking>=3.2.0,<3.3.0 # Apache-2.0
 
 coverage>=4.0,!=4.4 # Apache-2.0
-python-subunit>=0.0.18 # Apache-2.0/BSD
-oslotest>=1.10.0 # Apache-2.0
+python-subunit>=1.0.0 # Apache-2.0/BSD
+oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
-testtools>=1.4.0 # MIT
+testtools>=2.2.0 # MIT
 nose>=1.3.7 # LGPL
 pycodestyle>=2.0.0 # MIT
 pylint==1.9.2 # GPLv2
diff --git a/tools/pip-requires b/tools/pip-requires
index 47c6d02a..61248521 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -1,12 +1,12 @@
 # NOTE: OpenStack avoids some versions of eventlet, because of the
 # following issue.
 # https://github.com/eventlet/eventlet/issues/401
-eventlet!=0.18.3,>=0.18.2,!=0.20.1,!=0.21.0,!=0.23.0
-msgpack>=0.3.0  # RPC library, BGP speaker(net_cntl)
-netaddr
-oslo.config>=2.5.0
-ovs>=2.6.0  # OVSDB
-routes  # wsgi
-six>=1.4.0
+eventlet>=0.22.0,!=0.23.0
+msgpack>=0.5.0  # RPC library, BGP speaker(net_cntl)
+netaddr>=0.7.18
+oslo.config>=5.1.0
+ovs>=2.8.0  # OVSDB
+Routes>=2.3.1  # wsgi
+six>=1.10.0
 tinyrpc  # RPC library, BGP speaker(net_cntl)
-webob>=1.2  # wsgi
+WebOb>=1.8.2  # wsgi
diff --git a/tools/test-requires b/tools/test-requires
index 4cb58d39..c9e6ace8 100644
--- a/tools/test-requires
+++ b/tools/test-requires
@@ -1,6 +1,4 @@
-autopep8
-coverage
-nose
-pycodestyle
-pylint
-formencode
+coverage>=4.0,!=4.4
+nose>=1.3.7
+pycodestyle>=2.0.0
+pylint==1.9.2