diff --git a/Pipfile b/Pipfile
deleted file mode 100644
index b4afb6b..0000000
--- a/Pipfile
+++ /dev/null
@@ -1,21 +0,0 @@
-[[source]]
-name = "pypi"
-url = "https://pypi.org/simple"
-verify_ssl = true
-
-[dev-packages]
-setuptools = "*"
-twine = "*"
-wheel = "*"
-pytest = "*"
-tox = "*"
-sphinx = "*"
-numpydoc = "*"
-pytest-cov = "*"
-glo = {editable = true, path = "."}
-pylint = "*"
-
-[packages]
-pint = "*"
-numpy = "*"
-
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..9804ba2
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,1117 @@
+[[package]]
+name = "alabaster"
+version = "0.7.12"
+description = "A configurable sidebar-enabled Sphinx theme"
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "appdirs"
+version = "1.4.4"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "astroid"
+version = "2.4.2"
+description = "An abstract syntax tree for Python with inference support."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.dependencies]
+lazy-object-proxy = ">=1.4.0,<1.5.0"
+six = ">=1.12,<2.0"
+typed-ast = {version = ">=1.4.0,<1.5", markers = "implementation_name == \"cpython\" and python_version < \"3.8\""}
+wrapt = ">=1.11,<2.0"
+
+[[package]]
+name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "attrs"
+version = "20.3.0"
+description = "Classes Without Boilerplate"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.extras]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
+
+[[package]]
+name = "babel"
+version = "2.9.0"
+description = "Internationalization utilities"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+pytz = ">=2015.7"
+
+[[package]]
+name = "black"
+version = "20.8b1"
+description = "The uncompromising code formatter."
+category = "main"
+optional = true
+python-versions = ">=3.6"
+
+[package.dependencies]
+appdirs = "*"
+click = ">=7.1.2"
+dataclasses = {version = ">=0.6", markers = "python_version < \"3.7\""}
+mypy-extensions = ">=0.4.3"
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+regex = ">=2020.1.8"
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+typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
+
+[package.extras]
+colorama = ["colorama (>=0.4.3)"]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[[package]]
+name = "certifi"
+version = "2020.12.5"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "chardet"
+version = "4.0.0"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
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+version = "7.1.2"
+description = "Composable command line interface toolkit"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
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+description = "Cross-platform colored terminal text."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "coverage"
+version = "5.3.1"
+description = "Code coverage measurement for Python"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+
+[package.extras]
+toml = ["toml"]
+
+[[package]]
+name = "dataclasses"
+version = "0.8"
+description = "A backport of the dataclasses module for Python 3.6"
+category = "main"
+optional = true
+python-versions = ">=3.6, <3.7"
+
+[[package]]
+name = "distlib"
+version = "0.3.1"
+description = "Distribution utilities"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "docutils"
+version = "0.16"
+description = "Docutils -- Python Documentation Utilities"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "filelock"
+version = "3.0.12"
+description = "A platform independent file lock."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "flake8"
+version = "3.8.4"
+description = "the modular source code checker: pep8 pyflakes and co"
+category = "main"
+optional = true
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+
+[package.dependencies]
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+mccabe = ">=0.6.0,<0.7.0"
+pycodestyle = ">=2.6.0a1,<2.7.0"
+pyflakes = ">=2.2.0,<2.3.0"
+
+[[package]]
+name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "imagesize"
+version = "1.2.0"
+description = "Getting image size from png/jpeg/jpeg2000/gif file"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "importlib-metadata"
+version = "3.4.0"
+description = "Read metadata from Python packages"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
+zipp = ">=0.5"
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+
+[[package]]
+name = "importlib-resources"
+version = "5.1.0"
+description = "Read resources from Python packages"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+zipp = {version = ">=0.4", markers = "python_version < \"3.8\""}
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "pytest-black (>=0.3.7)", "pytest-mypy"]
+
+[[package]]
+name = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "isort"
+version = "5.7.0"
+description = "A Python utility / library to sort Python imports."
+category = "main"
+optional = true
+python-versions = ">=3.6,<4.0"
+
+[package.extras]
+pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
+requirements_deprecated_finder = ["pipreqs", "pip-api"]
+colors = ["colorama (>=0.4.3,<0.5.0)"]
+
+[[package]]
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+description = "A very fast and expressive template engine."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+MarkupSafe = ">=0.23"
+
+[package.extras]
+i18n = ["Babel (>=0.8)"]
+
+[[package]]
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+description = "A fast and thorough lazy object proxy."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "markupsafe"
+version = "1.1.1"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "main"
+optional = true
+python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
+
+[[package]]
+name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "numpydoc"
+version = "1.1.0"
+description = "Sphinx extension to support docstrings in Numpy format"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.dependencies]
+Jinja2 = ">=2.3"
+sphinx = ">=1.6.5"
+
+[package.extras]
+testing = ["matplotlib", "pytest", "pytest-cov"]
+
+[[package]]
+name = "packaging"
+version = "20.8"
+description = "Core utilities for Python packages"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
+
+[[package]]
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+version = "0.8.1"
+description = "Utility library for gitignore style pattern matching of file paths."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
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+version = "0.16.1"
+description = "Physical quantities module"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+importlib-resources = {version = "*", markers = "python_version < \"3.7\""}
+packaging = "*"
+
+[package.extras]
+numpy = ["numpy (>=1.14)"]
+test = ["pytest", "pytest-mpl", "pytest-cov"]
+uncertainties = ["uncertainties (>=3.0)"]
+
+[[package]]
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+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+
+[[package]]
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+version = "1.10.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pycodestyle"
+version = "2.6.0"
+description = "Python style guide checker"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pyflakes"
+version = "2.2.0"
+description = "passive checker of Python programs"
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pygments"
+version = "2.7.4"
+description = "Pygments is a syntax highlighting package written in Python."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[[package]]
+name = "pylint"
+version = "2.6.0"
+description = "python code static checker"
+category = "main"
+optional = true
+python-versions = ">=3.5.*"
+
+[package.dependencies]
+astroid = ">=2.4.0,<=2.5"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+isort = ">=4.2.5,<6"
+mccabe = ">=0.6,<0.7"
+toml = ">=0.7.1"
+
+[[package]]
+name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "pytest"
+version = "6.2.1"
+description = "pytest: simple powerful testing with Python"
+category = "main"
+optional = true
+python-versions = ">=3.6"
+
+[package.dependencies]
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
+attrs = ">=19.2.0"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<1.0.0a1"
+py = ">=1.8.2"
+toml = "*"
+
+[package.extras]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+
+[[package]]
+name = "pytest-cov"
+version = "2.11.1"
+description = "Pytest plugin for measuring coverage."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+coverage = ">=5.2.1"
+pytest = ">=4.6"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
+
+[[package]]
+name = "pytz"
+version = "2020.5"
+description = "World timezone definitions, modern and historical"
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "regex"
+version = "2020.11.13"
+description = "Alternative regular expression module, to replace re."
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "requests"
+version = "2.25.1"
+description = "Python HTTP for Humans."
+category = "main"
+optional = true
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+chardet = ">=3.0.2,<5"
+idna = ">=2.5,<3"
+urllib3 = ">=1.21.1,<1.27"
+
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+
+[[package]]
+name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "snowballstemmer"
+version = "2.1.0"
+description = "This package provides 29 stemmers for 28 languages generated from Snowball algorithms."
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "sphinx"
+version = "3.4.3"
+description = "Python documentation generator"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.dependencies]
+alabaster = ">=0.7,<0.8"
+babel = ">=1.3"
+colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
+docutils = ">=0.12"
+imagesize = "*"
+Jinja2 = ">=2.3"
+packaging = "*"
+Pygments = ">=2.0"
+requests = ">=2.5.0"
+snowballstemmer = ">=1.1"
+sphinxcontrib-applehelp = "*"
+sphinxcontrib-devhelp = "*"
+sphinxcontrib-htmlhelp = "*"
+sphinxcontrib-jsmath = "*"
+sphinxcontrib-qthelp = "*"
+sphinxcontrib-serializinghtml = "*"
+
+[package.extras]
+docs = ["sphinxcontrib-websupport"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.790)", "docutils-stubs"]
+test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
+
+[[package]]
+name = "sphinxcontrib-applehelp"
+version = "1.0.2"
+description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-devhelp"
+version = "1.0.2"
+description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-htmlhelp"
+version = "1.0.3"
+description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest", "html5lib"]
+
+[[package]]
+name = "sphinxcontrib-jsmath"
+version = "1.0.1"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+test = ["pytest", "flake8", "mypy"]
+
+[[package]]
+name = "sphinxcontrib-qthelp"
+version = "1.0.3"
+description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "sphinxcontrib-serializinghtml"
+version = "1.1.4"
+description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
+category = "main"
+optional = true
+python-versions = ">=3.5"
+
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
+[[package]]
+name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "tox"
+version = "3.21.2"
+description = "tox is a generic virtualenv management and test command line tool"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+
+[package.dependencies]
+colorama = {version = ">=0.4.1", markers = "platform_system == \"Windows\""}
+filelock = ">=3.0.0"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+packaging = ">=14"
+pluggy = ">=0.12.0"
+py = ">=1.4.17"
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+toml = ">=0.9.4"
+virtualenv = ">=16.0.0,<20.0.0 || >20.0.0,<20.0.1 || >20.0.1,<20.0.2 || >20.0.2,<20.0.3 || >20.0.3,<20.0.4 || >20.0.4,<20.0.5 || >20.0.5,<20.0.6 || >20.0.6,<20.0.7 || >20.0.7"
+
+[package.extras]
+docs = ["pygments-github-lexers (>=0.0.5)", "sphinx (>=2.0.0)", "sphinxcontrib-autoprogram (>=0.1.5)", "towncrier (>=18.5.0)"]
+testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "pytest-xdist (>=1.22.2)", "pathlib2 (>=2.3.3)"]
+
+[[package]]
+name = "typed-ast"
+version = "1.4.2"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "main"
+optional = true
+python-versions = "*"
+
+[[package]]
+name = "typing-extensions"
+version = "3.7.4.3"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "main"
+optional = false
+python-versions = "*"
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diff --git a/pyproject.toml b/pyproject.toml
index a8f43fe..af4063c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,2 +1,36 @@
 [tool.black]
 line-length = 79
+
+[tool.poetry]
+name = "glo"
+version = "0.1.0"
+description = "Grocery List Optimizer"
+authors = ["Ryan Drew <ryan@thedrews.org>"]
+license = "MIT"
+readme = "README.md"
+homepage = "https://github.com/learnitall/glo"
+documentation = "https://glo.readthedocs.io/en/latest/"
+include =  ["LICENSE"]
+
+[tool.poetry.dependencies]
+python = "^3.6"
+pint = "*"
+pytest = { version = "*", optional = true }
+pytest-cov = { version = "*", optional = true }
+sphinx = { version = "*", optional = true }
+numpydoc = { version = "*", optional = true }
+flake8 = { version = "*", optional = true }
+pylint = { version = "*", optional = true }
+black = { version = "*", optional = true }
+
+[tool.poetry.dev-dependencies]
+tox = "*"
+
+[tool.poetry.extras]
+test = ["pytest", "pytest-cov"]
+docs = ["sphinx", "numpydoc"]
+lint = ["flake8", "pylint", "black"]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 244439b..0000000
--- a/setup.py
+++ /dev/null
@@ -1,22 +0,0 @@
-import setuptools
-
-with open("README.md", "r", encoding="utf-8") as fh:
-    long_description = fh.read()
-
-setuptools.setup(
-    name="glo",
-    version="0.1",
-    author="Ryan Drew",
-    author_email="rdrew@learnin.today",
-    description="Grocery List Optimizer",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/learnitall/glo",
-    packages=setuptools.find_packages(),
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: OS Independent",
-    ],
-    python_requires='>=3.6',
-)
diff --git a/tox.ini b/tox.ini
index 9271c5f..2332bf2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,46 +1,33 @@
 [tox]
 envlist = py36,py37,py38,py39,docs,pylint,black,flake8
+isolated_build = true
 
 [testenv]
-deps =
-    pytest
-    pytest-cov
-    pipenv
+extras =
+    test
 commands =
-    python3 -m pipenv install --deploy --ignore-pipfile
-    python3 -m pytest --cov=glo --doctest-modules
+    pytest --cov glo --doctest-modules
 
 [testenv:docs]
-basepython=python3.6
-deps =
-    -r docs/requirements.txt
+extras =
+    docs
 commands =
-    python3 -m pipenv install --deploy --ignore-pipfile
     sphinx-build -W -b html -d "{toxworkdir}/docs_doctree" -a docs/source "{toxworkdir}/docs_out"
 
 [testenv:pylint]
-basepython=python3.9
-deps =
-    pylint
-    pipenv
+extras =
+    lint
 commands =
-    python3 -m pipenv install --deploy --ignore-pipfile
     pylint glo
 
 [testenv:black]
-basepython=python3.9
-deps =
-    black
-    pipenv
+extras =
+    lint
 commands =
-    python3 -m pipenv install --deploy --ignore-pipfile
     black --check --diff glo
 
 [testenv:flake8]
-basepython=python3.9
-deps =
-    flake8
-    pipenv
+extras =
+    lint
 commands =
-    python3 -m pipenv install --deploy --ignore-pipfile
     flake8 ./glo/