diff --git a/lower-constraints.txt b/lower-constraints.txt
index 02b59e7..1b544e9 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -1,47 +1,17 @@
-alabaster==0.7.10
-appdirs==1.3.0
-Babel==2.3.4
-coverage==4.0
-docutils==0.11
-dulwich==0.15.0
-extras==1.0.0
-fixtures==3.0.0
-flake8==2.5.5
-hacking==0.11.0
-imagesize==0.7.1
-iso8601==0.1.11
-Jinja2==2.10
-keystoneauth1==3.4.0
-linecache2==1.0.0
-MarkupSafe==1.0
-mccabe==0.2.1
-mox3==0.20.0
-openstackdocstheme==2.2.1
-os-client-config==1.28.0
-oslo.i18n==3.15.3
-oslotest==3.2.0
-pbr==2.0.0
-pep8==1.5.7
-ply==3.10
-pyflakes==0.8.1
-Pygments==2.2.0
-python-dateutil==2.5.3
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.12
-reno==3.1.0
-requests==2.14.2
-requestsexceptions==1.2.0
-semantic-version==2.3.1
-snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
-stevedore==1.20.0
-stestr==1.0.0
-testrepository==0.0.18
-testscenarios==0.4
-testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
-yaql==1.1.3
+coverage!=4.4,>=4.0 # Apache-2.0
+hacking<3.1.0,>=3.0.1 # Apache-2.0
+openstackdocstheme>=2.2.1 # Apache-2.0
+oslo.i18n>=3.15.3 # Apache-2.0
+oslotest>=3.2.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
+python-subunit>=1.0.0 # Apache-2.0/BSD
+PyYAML>=3.12 # MIT
+reno>=3.1.0 # Apache-2.0
+semantic-version>=2.3.1 # BSD
+sphinx!=2.1.0,>=2.0.0 # BSD
+stestr>=1.0.0 # Apache-2.0
+stevedore>=1.20.0 # Apache-2.0
+testrepository>=0.0.18 # Apache-2.0/BSD
+testscenarios>=0.4 # Apache-2.0/BSD
+testtools>=2.2.0 # MIT
+yaql>=1.1.3 # Apache 2.0 License