diff --git a/.travis.yml b/.travis.yml
index c928a6a..e5aab2e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,24 +1,30 @@
 language: python
-cache: pip
-
+sudo: false
 python:
- - '3.4'
- - '3.5'
- - '3.6'
+  - '2.7'
+  - '3.4'
+  - '3.5'
+  - '3.6'
 
-env:
- - DRF=3.7
- - DRF=3.8
+cache:
+  directories:
+  - $HOME/.cache/pip
+  - .tox
+before_cache:
+  - rm -f $HOME/.cache/pip/log/debug.log
+  - rm -fr .tox/log/ .tox/*/log/ .tox/*/tmp/ .tox/dist .tox/*/lib/*/site-packages/drf_yasg*
 
 jobs:
   include:
-    - stage: test
-      python: '2.7'
-      env: DRF=3.7
+    - # workaround for python 3.7 on travis https://github.com/travis-ci/travis-ci/issues/9815#issuecomment-401756442
+      stage: test
+      python: '3.7'
+      dist: xenial
+      sudo: required
     -
       python: '3.6'
-      env: DRF=master
-    -
+      env: TOXENV=djmaster
+    - # readthedocs uses python 3.5 for building
       python: '3.5'
       env: TOXENV=docs
     -
@@ -40,29 +46,26 @@ jobs:
 
   allow_failures:
     - env: TOXENV=lint
-    - env: DRF=master
+    - env: TOXENV=djmaster
 
   fast_finish: true
 
 install:
- - pip install -r requirements/ci.txt
+ - python -m pip install -U pip
+ - pip install -U -r requirements/ci.txt
 
 before_script:
  - coverage erase
- - |
-  [[ -z "$TOXENV" && -z "$PYPI_DEPLOY" ]] && REPORT_COVERAGE="yes" || REPORT_COVERAGE="no";
-  echo "Reporting coverage: ${REPORT_COVERAGE}"
- - |
-  [[ -z "$TOXENV" && ! -z "$DRF" && "$DRF" != "master" ]] && USE_DETOX="yes" || USE_DETOX="no";
-  echo "Using detox: ${USE_DETOX}"
 
 script:
- - 'if [[ "$USE_DETOX" == "yes" ]]; then detox; else tox; fi'
+ - tox
 
 after_success:
- - coverage combine
- - 'if [[ "$REPORT_COVERAGE" == "yes" ]]; then coverage report; fi'
- - 'if [[ "$REPORT_COVERAGE" == "yes" ]]; then codecov; fi'
+  - |
+    if [[ -z "$TOXENV" && -z "$PYPI_DEPLOY" ]]; then
+      chmod +x coverage.sh
+      ./coverage.sh
+    fi
 
 branches:
   only:
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 90e0bc2..d6c8181 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -35,8 +35,8 @@ You want to contribute some code? Great! Here are a few steps to get you started
 
       $ virtualenv venv
       $ source venv/bin/activate
-      (venv) $ pip install -e .[validation]
-      (venv) $ pip install -r requirements/dev.txt
+      (venv) $ pip install -U -e .[validation]
+      (venv) $ pip install -U -r requirements/dev.txt
 
 #. **Make your changes and check them against the test project**
 
diff --git a/README.rst b/README.rst
index e4b2213..f262ebc 100644
--- a/README.rst
+++ b/README.rst
@@ -11,9 +11,9 @@ Generate **real** Swagger/OpenAPI 2.0 specifications from a Django Rest Framewor
 
 Compatible with
 
-- **Django Rest Framework**: 3.7.7, 3.8.x
-- **Django**: 1.11.x, 2.0.x
-- **Python**: 2.7, 3.4, 3.5, 3.6
+- **Django Rest Framework**: 3.7.7, 3.8
+- **Django**: 1.11, 2.0, 2.1
+- **Python**: 2.7, 3.4, 3.5, 3.6, 3.7
 
 Resources:
 
@@ -85,14 +85,14 @@ The preferred instalation method is directly from pypi:
 
 .. code:: console
 
-   pip install drf-yasg
+   pip install -U drf-yasg
 
 Additionally, if you want to use the built-in validation mechanisms (see `4. Validation`_), you need to install
 some extra requirements:
 
 .. code:: console
 
-   pip install drf-yasg[validation]
+   pip install -U drf-yasg[validation]
 
 .. _readme-quickstart:
 
@@ -294,7 +294,7 @@ For additional usage examples, you can take a look at the test project in the ``
    $ virtualenv venv
    $ source venv/bin/activate
    (venv) $ cd testproj
-   (venv) $ pip install -r requirements.txt
+   (venv) $ pip install -U -r requirements.txt
    (venv) $ python manage.py migrate
    (venv) $ python manage.py shell -c "import createsuperuser"
    (venv) $ python manage.py runserver
@@ -315,8 +315,8 @@ From here on, the terms “OpenAPI” and “Swagger” are used interchangeably
 Swagger in Django Rest Framework
 ================================
 
-Since Django Rest 3.7, there is now `built in support <http://www.django-rest-framework.org/api-guide/schemas/>`__ for
-automatic OpenAPI 2.0 schema generation. However, this generation is based on the `coreapi <http://www.coreapi.org/>`__
+Since Django Rest Framework 3.7, there is now `built in support <http://www.django-rest-framework.org/api-guide/schemas/>`__
+for automatic OpenAPI 2.0 schema generation. However, this generation is based on the `coreapi <http://www.coreapi.org/>`__
 standard, which for the moment is vastly inferior to OpenAPI in both features and tooling support. In particular,
 the OpenAPI codec/compatibility layer provided has a few major problems:
 
@@ -329,18 +329,15 @@ In short this makes the generated schema unusable for code generation, and medio
 Other libraries
 ===============
 
-There are currently two decent Swagger schema generators that I could
-find for django-rest-framework:
+There are currently two decent Swagger schema generators that I could find for django-rest-framework:
 
 * `django-rest-swagger <https://github.com/marcgibbons/django-rest-swagger>`__
 * `drf-openapi <https://github.com/limdauto/drf_openapi>`__
 
-Out of the two, ``django-rest-swagger`` is just a wrapper around DRF 3.7 schema generation with an added UI, and
-thus presents the same problems. ``drf-openapi`` is a bit more involved and implements some custom handling for response
-schemas, but ultimately still falls short in code generation because the responses are plain of lacking support for
-named schemas.
-
-Both projects are also currently unmantained.
+``django-rest-swagger`` is just a wrapper around DRF 3.7 schema generation with an added UI, and
+thus presents the same problems, while also being unmaintained. ``drf-openapi`` was
+`discontinued by the author <https://github.com/limdauto/drf_openapi/commit/1673c6e039eec7f089336a83bdc31613f32f7e21>`_
+on April 3rd, 2018.
 
 ************************
 Third-party integrations
diff --git a/coverage.sh b/coverage.sh
new file mode 100755
index 0000000..3e4a51e
--- /dev/null
+++ b/coverage.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -ex
+
+coverage combine
+coverage report
+codecov
diff --git a/requirements.txt b/requirements.txt
index 5a5a649..b7d456c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
+-r requirements/setup.txt
 .[validation]
 -r requirements/heroku.txt
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 8a866e0..9e61e77 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,6 +1,4 @@
-# requirements for local development to be installed via pip install -r requirements/dev.txt
+# requirements for local development to be installed via pip install -U -r requirements/dev.txt
 -r tox.txt
 -r test.txt
 -r lint.txt
-
-tox-battery>=0.5
diff --git a/requirements/docs.txt b/requirements/docs.txt
index 58790aa..b528a74 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -4,5 +4,5 @@ sphinx_rtd_theme>=0.2.4
 Pillow>=4.3.0
 readme_renderer>=17.2
 
-Django>=2.0,<2.1
+Django>=2.0
 djangorestframework_camel_case>=0.2.0
diff --git a/requirements/setup.txt b/requirements/setup.txt
index 72e1362..bf6789e 100644
--- a/requirements/setup.txt
+++ b/requirements/setup.txt
@@ -1,4 +1,3 @@
 # needed to build the package setup_requires in setup.py
 
-# do not unpin this (see setup.py)
-setuptools_scm==1.15.6
+setuptools-scm>=3.0.6
diff --git a/requirements/test.txt b/requirements/test.txt
index 66cbe9c..135152b 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -1,5 +1,5 @@
 # requirements for running the tests via pytest
-pytest>=2.9
+pytest>=2.9,<3.7  # <3.7 because of incompatible pluggy requirement
 pytest-pythonpath>=0.7.1
 pytest-cov>=2.5.1
 pytest-xdist>=1.22.0
diff --git a/requirements/tox.txt b/requirements/tox.txt
index 722c32b..6e3809e 100644
--- a/requirements/tox.txt
+++ b/requirements/tox.txt
@@ -1,5 +1,5 @@
 # requirements for building and running tox
-tox>=2.9.1,<3.0.0
-detox>=0.11
+tox>=3.1.2
+tox-battery>=0.5
 
 -r setup.txt
diff --git a/setup.py b/setup.py
old mode 100644
new mode 100755
index f462f5b..08d17ef
--- a/setup.py
+++ b/setup.py
@@ -1,10 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-import distutils.core
 import io
 import os
-import random
-import string
 import sys
 from setuptools import find_packages, setup
 
@@ -22,50 +19,24 @@ requirements_setup = read_req('setup.txt')
 requirements_validation = read_req('validation.txt')
 
 
-def _install_setup_requires(attrs):
-    # copied from setuptools
-    dist = distutils.core.Distribution(dict(
-        (k, v) for k, v in attrs.items()
-        if k in ('dependency_links', 'setup_requires')
-    ))
-    # Honor setup.cfg's options.
-    dist.parse_config_files(ignore_option_errors=True)
-    if dist.setup_requires:
-        dist.fetch_build_eggs(dist.setup_requires)
-
-
-try:
-    # try to install setuptools_scm before setuptools does it, otherwise our monkey patch below will come too early
-    # (setuptools_scm adds find_files hooks into setuptools on install)
-    _install_setup_requires({'setup_requires': requirements_setup})
-except Exception:
-    pass
-
-if 'sdist' in sys.argv:
-    try:
-        # see https://github.com/pypa/setuptools_scm/issues/190, setuptools_scm includes ALL versioned files from
-        # the git repo into the sdist by default, and there is no easy way to provide an opt-out;
-        # this hack is ugly but does the job; because this is not really a documented interface of the module,
-        # the setuptools_scm version should remain pinned to ensure it keeps working
-        import setuptools_scm.integration
-
-        setuptools_scm.integration.find_files = lambda _: []
-    except ImportError:
-        pass
-
 try:
     # this is a workaround for being able to install the package from source without working from a git checkout
     # it is needed for building succesfully on Heroku
     from setuptools_scm import get_version
+except ImportError:
+    get_version = None
 
+try:
     version = get_version()
     version_kwargs = {'use_scm_version': True}
-except LookupError:
-    if 'sdist' in sys.argv or 'bdist_wheel' in sys.argv:
+except Exception:
+    if any(any(dist in arg for dist in ['sdist', 'bdist']) for arg in sys.argv):
         raise
 
-    rnd = ''.join(random.choice(string.ascii_lowercase + string.digits) for _ in range(16))
-    version_kwargs = {'version': '0.0.0.dummy+' + rnd}
+    import time
+    timestamp_ms = int(time.time() * 1000)
+    timestamp_str = hex(timestamp_ms)[2:].zfill(16)
+    version_kwargs = {'version': '0.0.0.dummy+' + timestamp_str}
 
 setup(
     name='drf-yasg',
@@ -89,7 +60,7 @@ setup(
     classifiers=[
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',
-        'Development Status :: 4 - Beta',
+        'Development Status :: 5 - Production/Stable',
         'Operating System :: OS Independent',
         'Environment :: Web Environment',
         'Programming Language :: Python',
@@ -99,9 +70,11 @@ setup(
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Framework :: Django',
         'Framework :: Django :: 1.11',
         'Framework :: Django :: 2.0',
+        'Framework :: Django :: 2.1',
         'Topic :: Documentation',
         'Topic :: Software Development :: Code Generators',
     ],
diff --git a/src/drf_yasg/codecs.py b/src/drf_yasg/codecs.py
index 9739f75..c150d50 100644
--- a/src/drf_yasg/codecs.py
+++ b/src/drf_yasg/codecs.py
@@ -5,7 +5,6 @@ import json
 from collections import OrderedDict
 
 from coreapi.compat import force_bytes
-from django.utils.safestring import SafeData, SafeText
 from ruamel import yaml
 
 from . import openapi
diff --git a/src/drf_yasg/utils.py b/src/drf_yasg/utils.py
index 67a1ac6..72a0d46 100644
--- a/src/drf_yasg/utils.py
+++ b/src/drf_yasg/utils.py
@@ -117,7 +117,7 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=unset, request_bo
             # no overrides to set, no use in doing more work
             return
 
-        # if the method is an @action, it will have a bind_to_methods attribute
+        # if the method is an @action, it will have a bind_to_methods attribute, or a mapper attribute for drf>3.8
         bind_to_methods = getattr(view_method, 'bind_to_methods', [])
         # if the method is actually a function based view (@api_view), it will have a 'cls' attribute
         view_cls = getattr(view_method, 'cls', None)
diff --git a/testproj/manage.py b/testproj/manage.py
old mode 100644
new mode 100755
diff --git a/tests/test_management.py b/tests/test_management.py
index c3cdd40..0ce1c55 100644
--- a/tests/test_management.py
+++ b/tests/test_management.py
@@ -1,5 +1,3 @@
-from six import StringIO
-
 import json
 import os
 import random
diff --git a/tox.ini b/tox.ini
index 9ce7fef..3789fd0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,28 +1,29 @@
 [tox]
+# https://docs.djangoproject.com/en/dev/faq/install/#what-python-version-can-i-use-with-django
 envlist =
-    py27-django111-drf37,
-    py{34,35,36}-django{111,20}-drf{37,38},
-    py36-django20-drfmaster,
-    lint, docs
-
-[travis:env]
-DRF =
-    3.7: drf37
-    3.8: drf38
-    master: drfmaster
+    py{27,34,35,36}-django111-drf37,
+    py{27,34,35,36}-django111-drf38,
+    py{34,35,36,37}-django20-drf37,
+    py{34,35,36,37}-django20-drf38,
+    py{35,36,37}-django21-drf37,
+    py{35,36,37}-django21-drf38,
+    djmaster, lint, docs
 
 [testenv]
 deps =
     django111: Django>=1.11,<2.0
     django20: Django>=2.0,<2.1
+    django21: Django>=2.1,<2.2
 
     drf37: djangorestframework>=3.7.7,<3.8
     drf38: djangorestframework>=3.8.0,<3.9
 
     # test with the latest build of django-rest-framework to get early warning of compatibility issues
-    drfmaster: https://github.com/encode/django-rest-framework/archive/master.tar.gz
+    djmaster: https://github.com/encode/django-rest-framework/archive/master.tar.gz
+    djmaster: https://github.com/django/django/archive/master.tar.gz
 
     # other dependencies
+    -rrequirements/setup.txt
     -rrequirements/validation.txt
     -rrequirements/test.txt
 
@@ -46,7 +47,7 @@ commands =
 [pytest]
 DJANGO_SETTINGS_MODULE = testproj.settings.local
 python_paths = testproj
-addopts = -n 3 --ignore=node_modules
+addopts = -n 2 --ignore=node_modules
 
 [flake8]
 max-line-length = 120
diff --git a/update-ui.sh b/update-ui.sh
old mode 100644
new mode 100755