diff --git a/.gitignore b/.gitignore
index 6262b77..55f127b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,12 @@
+*.mpy
+.idea
 __pycache__
 _build
 *.pyc
 .env
 build*
 bundles
-*.mpy
+*.DS_Store
+.eggs
+dist
+**/*.egg-info
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
index 732f877..fc745a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,32 +1,33 @@
-# This is a common .travis.yml for generating library release zip files for
-# CircuitPython library releases using circuitpython-build-tools.
-# See https://github.com/adafruit/circuitpython-build-tools for detailed setup
-# instructions.
-
 dist: trusty
 sudo: false
 language: python
 python:
-    - "3.6"
-
+- '3.6'
 cache:
-    pip: true
-
+  pip: true
 deploy:
-  provider: releases
-  api_key: $GITHUB_TOKEN
+- provider: releases
+  api_key: "$GITHUB_TOKEN"
   file_glob: true
-  file: $TRAVIS_BUILD_DIR/bundles/*
+  file: "$TRAVIS_BUILD_DIR/bundles/*"
   skip_cleanup: true
   overwrite: true
   on:
     tags: true
-
+- provider: pypi
+  user: adafruit-travis
+  on:
+    tags: true
+  password:
+    secure: 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
 install:
-  - pip install pylint circuitpython-build-tools Sphinx sphinx-rtd-theme
-
+- pip install -r requirements.txt
+- pip install pylint circuitpython-build-tools Sphinx sphinx-rtd-theme
+- pip install --force-reinstall pylint==1.9.2
 script:
-  - pylint adafruit_si5351.py
-  - ([[ ! -d "examples" ]] || pylint --disable=missing-docstring,invalid-name,bad-whitespace examples/*.py)
-  - circuitpython-build-bundles --filename_prefix adafruit-circuitpython-si5351 --library_location .
-  - cd docs && sphinx-build -E -W -b html . _build/html
+- pylint adafruit_si5351.py
+- ([[ ! -d "examples" ]] || pylint --disable=missing-docstring,invalid-name,bad-whitespace
+  examples/*.py)
+- circuitpython-build-bundles --filename_prefix adafruit-circuitpython-si5351 --library_location
+  .
+- cd docs && sphinx-build -E -W -b html . _build/html && cd ..
diff --git a/adafruit_si5351.py b/adafruit_si5351.py
index e7ceb1c..49a0f19 100644
--- a/adafruit_si5351.py
+++ b/adafruit_si5351.py
@@ -257,6 +257,8 @@ def frequency(self):
             base_frequency = self._pll.frequency / self._divider
             # And add a further division for the R divider if set.
             r_divider = self.r_divider
+            # pylint: disable=no-else-return
+            # Disable should be removed when refactor can be tested.
             if r_divider == R_DIV_1:
                 return base_frequency
             elif r_divider == R_DIV_2:
diff --git a/docs/conf.py b/docs/conf.py
index 5cbd4e6..332ac54 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,7 @@
 # Uncomment the below if you use native CircuitPython modules such as
 # digitalio, micropython and busio. List the modules you use. Without it, the
 # autodoc module docs will fail to generate with a warning.
-autodoc_mock_imports = ["digitalio", "busio", "ustruct", "micropython", "adafruit_bus_device", "adafruit_bus_device.i2c_device"]
+# autodoc_mock_imports = ["digitalio", "busio", "ustruct", "micropython", "adafruit_bus_device"]
 
 intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'BusDevice': ('https://circuitpython.readthedocs.io/projects/bus_device/en/latest/', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}
 
diff --git a/requirements.txt b/requirements.txt
index c47d35a..3031961 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
-adafruit-circuitpython-bus-device
+Adafruit-Blinka
+adafruit-circuitpython-busdevice
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..dbec762
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,60 @@
+"""A setuptools based setup module.
+
+See:
+https://packaging.python.org/en/latest/distributing.html
+https://github.com/pypa/sampleproject
+"""
+
+# Always prefer setuptools over distutils
+from setuptools import setup, find_packages
+# To use a consistent encoding
+from codecs import open
+from os import path
+
+here = path.abspath(path.dirname(__file__))
+
+# Get the long description from the README file
+with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
+    long_description = f.read()
+
+setup(
+    name='adafruit-circuitpython-si5351',
+
+    use_scm_version=True,
+    setup_requires=['setuptools_scm'],
+
+    description='CircuitPython library for SI5351 clock generator module.',
+    long_description=long_description,
+    long_description_content_type='text/x-rst',
+
+    # The project's main homepage.
+    url='https://github.com/adafruit/Adafruit_CircuitPython_SI5351',
+
+    # Author details
+    author='Adafruit Industries',
+    author_email='circuitpython@adafruit.com',
+
+    install_requires=['Adafruit-Blinka', 'adafruit-circuitpython-busdevice'],
+
+    # Choose your license
+    license='MIT',
+
+    # See https://pypi.python.org/pypi?%3Aaction=list_classifiers
+    classifiers=[
+        'Development Status :: 3 - Alpha',
+        'Intended Audience :: Developers',
+        'Topic :: Software Development :: Libraries',
+        'Topic :: System :: Hardware',
+        'License :: OSI Approved :: MIT License',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+    ],
+
+    # What does your project relate to?
+    keywords='adafruit si5351 clock generator module breakout hardware micropython circuitpython',
+
+    # You can just specify the packages manually here if your project is
+    # simple. Or you can use find_packages().
+    py_modules=['adafruit_si5351'],
+)