diff --git a/doc/requirements.txt b/doc/requirements.txt
index 92f8ab6..f85dcc8 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -2,6 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-openstackdocstheme>=1.18.1 # Apache-2.0
-sphinx>=1.8.0,<2.0.0;python_version=='2.7' # BSD
-sphinx>=1.8.0,!=2.1.0;python_version>='3.4' # BSD
+openstackdocstheme>=1.31.2 # Apache-2.0
+sphinx>=1.8.0,!=2.1.0 # BSD
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 56e2547..12d2bf5 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -119,6 +119,3 @@ latex_elements = {
 repository_name = 'openstack/watcher-dashboard'
 bug_project = 'watcher-dashboard'
 bug_tag = ''
-
-# Must set this variable to include year, month, day, hours, and minutes.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 6bc1664..c8340e1 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -24,10 +24,8 @@ dulwich==0.19.0
 extras==1.0.0
 fasteners==0.14.1
 fixtures==3.0.0
-flake8==2.5.5
 futurist==1.6.0
-hacking==0.12.0
-horizon==17.1.0
+horizon==18.2.0
 httplib2==0.10.3
 idna==2.6
 imagesize==1.0.0
@@ -40,14 +38,13 @@ jsonschema==2.6.0
 keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
-mccabe==0.2.1
 mock==2.0.0
 monotonic==1.4
 msgpack==0.5.6
 munch==2.2.0
 netaddr==0.7.19
 netifaces==0.10.6
-openstackdocstheme==1.18.1
+openstackdocstheme==1.31.2
 openstacksdk==0.12.0
 os-client-config==1.29.0
 os-service-types==1.2.0
@@ -61,11 +58,9 @@ oslo.utils==3.36.0
 osprofiler==2.3.0
 packaging==17.1
 pbr==2.0.0
-pep8==1.5.7
 Pint==0.8.1
 prettytable==0.7.2
 pycparser==2.18
-pyflakes==0.8.1
 Pygments==2.2.0
 pymongo==3.6.1
 pyOpenSSL==17.5.0
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 0b89705..e2fad91 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -113,10 +113,6 @@ repository_name = 'openstack/watcher-dashboard'
 bug_project = 'watcher-dashboard'
 bug_tag = ''
 
-# Must set this variable to include year, month, day, hours, and minutes.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
-
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
diff --git a/requirements.txt b/requirements.txt
index b85ab47..152030e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
-horizon>=17.1.0 # Apache-2.0
+horizon>=18.2.0 # Apache-2.0
 
 PyYAML>=3.12 # MIT
 python-watcherclient>=1.1.0 # Apache-2.0
diff --git a/setup.cfg b/setup.cfg
index 3afa905..56bc960 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,6 +6,7 @@ description-file =
 author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
 home-page = https://docs.openstack.org/watcher-dashboard/latest
+python-requires = >=3.6
 classifier =
     Development Status :: 5 - Production/Stable
     Environment :: OpenStack
@@ -17,6 +18,8 @@ classifier =
     Operating System :: OS Independent
     Operating System :: POSIX :: Linux
     Programming Language :: Python
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
@@ -26,11 +29,6 @@ classifier =
 packages =
     watcher_dashboard
 
-[build_sphinx]
-all_files = 1
-build-dir = doc/build
-source-dir = doc/source
-
 [nosetests]
 verbosity=2
 detailed-errors=1
diff --git a/setup.py b/setup.py
index 566d844..cd35c3c 100644
--- a/setup.py
+++ b/setup.py
@@ -13,17 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
 import setuptools
 
-# In python < 2.7.4, a lazy loading of package `pbr` will break
-# setuptools if some other modules registered functions in `atexit`.
-# solution from: http://bugs.python.org/issue15881#msg170215
-try:
-    import multiprocessing  # noqa
-except ImportError:
-    pass
-
 setuptools.setup(
     setup_requires=['pbr>=2.0.0'],
     pbr=True)
diff --git a/test-requirements.txt b/test-requirements.txt
index e409528..affbba6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 # Hacking already pins down pep8, pyflakes and flake8
 
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
@@ -14,7 +14,6 @@ testtools>=2.2.0 # MIT
 xvfbwrapper>=0.1.3 #license: MIT
 
 # Doc requirements
-openstackdocstheme>=1.18.1 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7'  # BSD
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4'  # BSD
+openstackdocstheme>=1.31.2 # Apache-2.0
+sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2  # BSD
 reno>=2.5.0 # Apache-2.0
diff --git a/tools/install_venv_common.py b/tools/install_venv_common.py
index 46822e3..d73649c 100644
--- a/tools/install_venv_common.py
+++ b/tools/install_venv_common.py
@@ -22,8 +22,6 @@ environment, it should be kept strictly compatible with Python 2.6.
 Synced in from openstack-common
 """
 
-from __future__ import print_function
-
 import optparse
 import os
 import subprocess
diff --git a/tox.ini b/tox.ini
index 3285cab..f2c1c30 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,7 @@ envlist = py37,py36,pep8
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 setenv = VIRTUAL_ENV={envdir}
          DJANGO_SETTINGS_MODULE=watcher_dashboard.test.settings
@@ -26,31 +27,25 @@ commands =
         watcher_dashboard
 
 [testenv:pep8]
-basepython = python3
 commands = flake8
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:releasenotes]
-basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees --keep-going -b html releasenotes/source releasenotes/build/html
 
 [testenv:cover]
-basepython = python3
 commands = python setup.py testr --coverage --testr-args='{posargs}'
 
 [testenv:docs]
-basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
-commands = python setup.py build_sphinx
+commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pdf-docs]
-basepython = python3
 envdir = {toxworkdir}/docs
 deps = {[testenv:docs]deps}
 whitelist_externals =
@@ -62,19 +57,18 @@ commands =
   make -C doc/build/pdf
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [flake8]
 # F405 TEMPLATES may be undefined, or defined from star imports
 # (because it is not easy to avoid this in openstack_dashboard.test.settings)
-ignore = F405
+# W504 line break after binary operator
+ignore = F405,W504
 show-source = True
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,build,.ropeproject,tools
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
diff --git a/watcher_dashboard/api/watcher.py b/watcher_dashboard/api/watcher.py
index 01c6782..fa558f3 100644
--- a/watcher_dashboard/api/watcher.py
+++ b/watcher_dashboard/api/watcher.py
@@ -10,8 +10,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import unicode_literals
-
 import logging
 
 from django.conf import settings
diff --git a/watcher_dashboard/content/audit_templates/tables.py b/watcher_dashboard/content/audit_templates/tables.py
index 3acaa63..526eacc 100644
--- a/watcher_dashboard/content/audit_templates/tables.py
+++ b/watcher_dashboard/content/audit_templates/tables.py
@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import unicode_literals
-
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ungettext_lazy
 import horizon.exceptions
diff --git a/watcher_dashboard/content/audit_templates/tests.py b/watcher_dashboard/content/audit_templates/tests.py
index de87d90..fd0ae42 100644
--- a/watcher_dashboard/content/audit_templates/tests.py
+++ b/watcher_dashboard/content/audit_templates/tests.py
@@ -13,8 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from unittest import mock
+
 from django import urls
-import mock
 
 from watcher_dashboard import api
 from watcher_dashboard.test import helpers as test
diff --git a/watcher_dashboard/content/goals/tests.py b/watcher_dashboard/content/goals/tests.py
index 17a7e0d..bbc9050 100644
--- a/watcher_dashboard/content/goals/tests.py
+++ b/watcher_dashboard/content/goals/tests.py
@@ -13,8 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from unittest import mock
+
 from django import urls
-import mock
 
 from watcher_dashboard import api
 from watcher_dashboard.test import helpers as test
diff --git a/watcher_dashboard/content/strategies/tests.py b/watcher_dashboard/content/strategies/tests.py
index 1fc425a..6257728 100644
--- a/watcher_dashboard/content/strategies/tests.py
+++ b/watcher_dashboard/content/strategies/tests.py
@@ -13,8 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from unittest import mock
+
 from django import urls
-import mock
 
 from watcher_dashboard import api
 from watcher_dashboard.test import helpers as test
diff --git a/watcher_dashboard/test/api_tests/test_watcher.py b/watcher_dashboard/test/api_tests/test_watcher.py
index 04fc75f..e77d4be 100644
--- a/watcher_dashboard/test/api_tests/test_watcher.py
+++ b/watcher_dashboard/test/api_tests/test_watcher.py
@@ -13,8 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import absolute_import
-import mock
+from unittest import mock
+
 from watcher_dashboard import api
 from watcher_dashboard.test import helpers as test
 
diff --git a/watcher_dashboard/test/helpers.py b/watcher_dashboard/test/helpers.py
index 57155ae..df81d8b 100644
--- a/watcher_dashboard/test/helpers.py
+++ b/watcher_dashboard/test/helpers.py
@@ -16,7 +16,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import mock
+from unittest import mock
 
 from openstack_dashboard.test import helpers
 
diff --git a/watcher_dashboard/test/selenium.py b/watcher_dashboard/test/selenium.py
index e0506a5..1893268 100644
--- a/watcher_dashboard/test/selenium.py
+++ b/watcher_dashboard/test/selenium.py
@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import absolute_import
-
 import logging
 
 from horizon.test import helpers as test