diff --git a/doc/requirements.txt b/doc/requirements.txt
index e3e0b5c5..7208af68 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,2 @@
-sphinx>=1.6.2,!=1.6.6,!=1.6.7,<2.0.0;python_version=='2.7'  # BSD
-sphinx>=1.6.2,!=1.6.6,!=1.6.7,!=2.1.0;python_version>='3.4'  # BSD
-openstackdocstheme>=1.20.0 # Apache-2.0
+sphinx>=2.0.0  # BSD
+openstackdocstheme>=2.0.0 # Apache-2.0
diff --git a/os_net_config/impl_ifcfg.py b/os_net_config/impl_ifcfg.py
index b058e096..aa13b583 100644
--- a/os_net_config/impl_ifcfg.py
+++ b/os_net_config/impl_ifcfg.py
@@ -47,7 +47,7 @@ def ifcfg_config_path(name):
 
 
 def remove_ifcfg_config(ifname):
-    if re.match('[\w-]+$', ifname):
+    if re.match(r'[\w-]+$', ifname):
         ifcfg_file = ifcfg_config_path(ifname)
         if os.path.exists(ifcfg_file):
             os.remove(ifcfg_file)
@@ -430,7 +430,7 @@ class IfcfgNetConfig(os_net_config.NetConfig):
             data += "PKEY=yes\n"
             data += "PHYSDEV=%s\n" % base_opt.parent
             data += "PKEY_ID=%s\n" % base_opt.pkey_id
-        elif re.match('\w+\.\d+$', base_opt.name):
+        elif re.match(r'\w+\.\d+$', base_opt.name):
             data += "VLAN=yes\n"
         elif isinstance(base_opt, objects.Interface):
             if base_opt.linkdelay:
diff --git a/os_net_config/sriov_config.py b/os_net_config/sriov_config.py
index ec73fd31..2ffb0319 100644
--- a/os_net_config/sriov_config.py
+++ b/os_net_config/sriov_config.py
@@ -113,7 +113,7 @@ def get_numvfs(ifname):
                                          "device/sriov_numvfs")
         with open(sriov_numvfs_path, 'r') as f:
             return int(f.read())
-    except IOError as exc:
+    except IOError:
         msg = ("Unable to read numvfs for %s" % ifname)
         raise SRIOVNumvfsException(msg)
 
@@ -591,7 +591,7 @@ def main(argv=sys.argv):
     configure_logger(opts.verbose, opts.debug)
 
     if opts.numvfs:
-        if re.match("^\w+:\d+$", opts.numvfs):
+        if re.match(r"^\w+:\d+$", opts.numvfs):
             device_name, numvfs = opts.numvfs.split(':')
             _write_numvfs(device_name, int(numvfs))
         else:
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 726bc7c9..384b0971 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -142,11 +142,6 @@ html_theme = 'openstackdocs'
 # directly to the root of the documentation.
 # html_extra_path = []
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# html_last_updated_fmt = '%b %d, %Y'
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
diff --git a/setup.cfg b/setup.cfg
index da99a4e3..cb5d737c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -7,6 +7,7 @@ author = OpenStack
 author-email = openstack-discuss@lists.openstack.org
 license = Apache License (2.0)
 home-page = https://opendev.org/openstack/os-net-config
+python-requires = >=3.6
 classifier =
     Environment :: OpenStack
     Intended Audience :: Developers
@@ -14,6 +15,8 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: OS Independent
     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
@@ -26,16 +29,3 @@ packages =
 console_scripts =
         os-net-config = os_net_config.cli:main
         os-net-config-sriov = os_net_config.sriov_config:main
-
-[build_sphinx]
-source-dir = doc/source
-build-dir = doc/build
-all_files = 1
-
-[upload_sphinx]
-upload-dir = doc/build/html
-
-[egg_info]
-tag_build =
-tag_date = 0
-tag_svn_revision = 0
diff --git a/setup.py b/setup.py
index 566d8443..cd35c3c3 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 ed22996d..8fa262d2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 
 coverage>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
diff --git a/tox.ini b/tox.ini
index c4845dc8..92c9a1af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,6 @@ skipsdist = True
 [testenv]
 usedevelop = True
 basepython = python3
-install_command = pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
 deps =
@@ -37,8 +36,8 @@ commands =
 
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.
-
+# W504 line break after binary operator
 show-source = True
-ignore = E123,E125
+ignore = E123,E125,W504
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build