diff --git a/poetry.lock b/poetry.lock
index f365b582..2b8480a5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,27 +1,26 @@
 [[package]]
-category = "dev"
-description = "A configurable sidebar-enabled Sphinx theme"
 name = "alabaster"
+version = "0.7.12"
+description = "A configurable sidebar-enabled Sphinx theme"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.7.12"
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.3.0"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.3.0"
 
 [[package]]
-category = "dev"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "19.3.0"
+description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
 
 [package.extras]
 azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
@@ -30,87 +29,89 @@ docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "dev"
-description = "Internationalization utilities"
 name = "babel"
+version = "2.8.0"
+description = "Internationalization utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8.0"
 
 [package.dependencies]
 pytz = ">=2015.7"
 
 [[package]]
-category = "main"
-description = "Base58 and Base58Check implementation"
 name = "base58"
+version = "2.0.0"
+description = "Base58 and Base58Check implementation"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "2.0.0"
 
 [[package]]
-category = "main"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2019.11.28"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2019.11.28"
 
 [[package]]
-category = "main"
-description = "Foreign Function Interface for Python calling C code."
 name = "cffi"
+version = "1.13.2"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.13.2"
 
 [package.dependencies]
 pycparser = "*"
 
 [[package]]
-category = "main"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "main"
-description = "Composable command line interface toolkit"
 name = "click"
+version = "8.0.1"
+description = "Composable command line interface toolkit"
+category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "7.0"
+python-versions = ">=3.6"
+
+[package.dependencies]
+colorama = {version = "*", markers = "platform_system == \"Windows\""}
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 
 [[package]]
-category = "dev"
-description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
 name = "colorama"
+version = "0.4.3"
+description = "Cross-platform colored terminal text."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.0.3"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.0.3"
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
-category = "main"
-description = "Cython implementation of Toolz: High performance functional utilities"
-marker = "implementation_name == \"cpython\""
 name = "cytoolz"
+version = "0.10.1"
+description = "Cython implementation of Toolz: High performance functional utilities"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.10.1"
 
 [package.dependencies]
 toolz = ">=0.8.0"
@@ -119,20 +120,20 @@ toolz = ">=0.8.0"
 cython = ["cython"]
 
 [[package]]
-category = "main"
-description = "Decorators for Humans"
 name = "decorator"
+version = "4.4.1"
+description = "Decorators for Humans"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*"
-version = "4.4.1"
 
 [[package]]
-category = "main"
-description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
 name = "deprecated"
+version = "1.2.7"
+description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.2.7"
 
 [package.dependencies]
 wrapt = ">=1.10,<2"
@@ -141,79 +142,79 @@ wrapt = ">=1.10,<2"
 dev = ["tox", "bumpversion (<1)", "sphinx (<2)", "PyTest (<5)", "PyTest-Cov (<2.6)", "pytest", "pytest-cov"]
 
 [[package]]
-category = "dev"
-description = "Docutils -- Python Documentation Utilities"
 name = "docutils"
+version = "0.16"
+description = "Docutils -- Python Documentation Utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.16"
 
 [[package]]
-category = "dev"
-description = "Discover and load entry points from installed packages."
 name = "entrypoints"
+version = "0.3"
+description = "Discover and load entry points from installed packages."
+category = "dev"
 optional = false
 python-versions = ">=2.7"
-version = "0.3"
 
 [[package]]
-category = "main"
-description = "eth-hash: The Ethereum hashing function, keccak256, sometimes (erroneously) called sha3"
 name = "eth-hash"
+version = "0.2.0"
+description = "eth-hash: The Ethereum hashing function, keccak256, sometimes (erroneously) called sha3"
+category = "main"
 optional = false
 python-versions = ">=3.5, <4"
-version = "0.2.0"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "pytest (3.3.2)", "tox (>=2.9.1,<3)", "flake8 (3.4.1)", "isort (>=4.2.15,<5)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
+dev = ["bumpversion (>=0.5.3,<1)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "pytest (==3.3.2)", "tox (>=2.9.1,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (3.4.1)", "isort (>=4.2.15,<5)"]
+lint = ["flake8 (==3.4.1)", "isort (>=4.2.15,<5)"]
 pycryptodome = ["pycryptodome (>=3.6.6,<4)"]
 pysha3 = ["pysha3 (>=1.0.0,<2.0.0)"]
-test = ["pytest (3.3.2)", "tox (>=2.9.1,<3)"]
+test = ["pytest (==3.3.2)", "tox (>=2.9.1,<3)"]
 
 [[package]]
-category = "main"
-description = "eth-typing: Common type annotations for ethereum python packages"
 name = "eth-typing"
+version = "2.2.1"
+description = "eth-typing: Common type annotations for ethereum python packages"
+category = "main"
 optional = false
 python-versions = ">=3.5, <4"
-version = "2.2.1"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)", "flake8 (3.4.1)", "isort (>=4.2.15,<5)", "mypy (0.701)", "pydocstyle (>=3.0.0,<4)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
+dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (3.4.1)", "isort (>=4.2.15,<5)", "mypy (0.701)", "pydocstyle (>=3.0.0,<4)"]
+lint = ["flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)"]
 test = ["pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)"]
 
 [[package]]
-category = "main"
-description = "Common utility functions for ethereum codebases."
 name = "eth-utils"
+version = "1.8.4"
+description = "Common utility functions for ethereum codebases."
+category = "main"
 optional = false
 python-versions = ">=3.5,!=3.5.2,<4"
-version = "1.8.4"
 
 [package.dependencies]
-cytoolz = ">=0.10.1,<1.0.0"
+cytoolz = {version = ">=0.10.1,<1.0.0", markers = "implementation_name == \"cpython\""}
 eth-hash = ">=0.1.0,<1.0.0"
 eth-typing = ">=2.2.1,<3.0.0"
-toolz = ">0.8.2,<1"
+toolz = {version = ">0.8.2,<1", markers = "implementation_name == \"pypy\""}
 
 [package.extras]
 deploy = ["bumpversion (>=0.5.3,<1.0.0)", "tox (>=2.9.1,<3.0.0)", "wheel (>=0.30.0,<1.0.0)"]
-dev = ["twine (>=1.13,<2)", "Sphinx (>=1.5.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)", "black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (4.3.18)", "mypy (0.701)", "pytest (>=3.4.1,<4.0.0)", "hypothesis (>=4.43.0,<5.0.0)", "pytest-pythonpath (>=0.3,<1.0)", "bumpversion (>=0.5.3,<1.0.0)", "tox (>=2.9.1,<3.0.0)", "wheel (>=0.30.0,<1.0.0)"]
+dev = ["twine (>=1.13,<2)", "Sphinx (>=1.5.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)", "black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (==4.3.18)", "mypy (==0.701)", "pytest (>=3.4.1,<4.0.0)", "hypothesis (>=4.43.0,<5.0.0)", "pytest-pythonpath (>=0.3,<1.0)", "bumpversion (>=0.5.3,<1.0.0)", "tox (>=2.9.1,<3.0.0)", "wheel (>=0.30.0,<1.0.0)"]
 doc = ["Sphinx (>=1.5.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)"]
-lint = ["black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (4.3.18)", "mypy (0.701)", "pytest (>=3.4.1,<4.0.0)"]
+lint = ["black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (==4.3.18)", "mypy (==0.701)", "pytest (>=3.4.1,<4.0.0)"]
 test = ["hypothesis (>=4.43.0,<5.0.0)", "pytest (>=3.4.1,<4.0.0)", "pytest-pythonpath (>=0.3,<1.0)"]
 
 [[package]]
-category = "dev"
-description = "the modular source code checker: pep8, pyflakes and co"
 name = "flake8"
+version = "3.7.9"
+description = "the modular source code checker: pep8, pyflakes and co"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.7.9"
 
 [package.dependencies]
 entrypoints = ">=0.3.0,<0.4.0"
@@ -222,40 +223,39 @@ pycodestyle = ">=2.5.0,<2.6.0"
 pyflakes = ">=2.1.0,<2.2.0"
 
 [[package]]
-category = "dev"
-description = "Automatic Changelog generator using Jinja2 templates."
 name = "git-changelog"
+version = "0.2.0"
+description = "Automatic Changelog generator using Jinja2 templates."
+category = "dev"
 optional = false
 python-versions = ">=3.6,<4.0"
-version = "0.2.0"
 
 [package.dependencies]
 Jinja2 = ">=2.10,<3.0"
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.8"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8"
 
 [[package]]
-category = "dev"
-description = "Getting image size from png/jpeg/jpeg2000/gif file"
 name = "imagesize"
+version = "1.2.0"
+description = "Getting image size from png/jpeg/jpeg2000/gif file"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.2.0"
 
 [[package]]
-category = "dev"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.5.0"
+description = "Read metadata from Python packages"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.5.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -265,12 +265,12 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "importlib-resources"]
 
 [[package]]
-category = "dev"
-description = "A very fast and expressive template engine."
 name = "jinja2"
+version = "2.11.1"
+description = "A very fast and expressive template engine."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.11.1"
 
 [package.dependencies]
 MarkupSafe = ">=0.23"
@@ -279,44 +279,44 @@ MarkupSafe = ">=0.23"
 i18n = ["Babel (>=0.8)"]
 
 [[package]]
-category = "dev"
-description = "Safely add untrusted strings to HTML/XML markup."
 name = "markupsafe"
+version = "1.1.1"
+description = "Safely add untrusted strings to HTML/XML markup."
+category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "1.1.1"
 
 [[package]]
-category = "dev"
-description = "McCabe checker, plugin for flake8"
 name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.6.1"
 
 [[package]]
-category = "main"
-description = "Implementation of Bitcoin BIP-0039"
 name = "mnemonic"
+version = "0.19"
+description = "Implementation of Bitcoin BIP-0039"
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.19"
 
 [[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
+version = "8.2.0"
+description = "More routines for operating on iterables, beyond itertools"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "8.2.0"
 
 [[package]]
-category = "main"
-description = "A dot-accessible dictionary (a la JavaScript objects)"
 name = "munch"
+version = "2.5.0"
+description = "A dot-accessible dictionary (a la JavaScript objects)"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2.5.0"
 
 [package.dependencies]
 six = "*"
@@ -326,80 +326,78 @@ testing = ["pytest", "coverage", "astroid (>=1.5.3,<1.6.0)", "pylint (>=1.7.2,<1
 yaml = ["PyYAML (>=5.1.0)"]
 
 [[package]]
-category = "dev"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "20.1"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.1"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.8.1"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.1"
 
 [[package]]
-category = "dev"
-description = "Python style guide checker"
 name = "pycodestyle"
+version = "2.5.0"
+description = "Python style guide checker"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.5.0"
 
 [[package]]
-category = "main"
-description = "C parser in Python"
 name = "pycparser"
+version = "2.19"
+description = "C parser in Python"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.19"
 
 [[package]]
-category = "dev"
-description = "passive checker of Python programs"
 name = "pyflakes"
+version = "2.1.1"
+description = "passive checker of Python programs"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.1.1"
 
 [[package]]
-category = "dev"
-description = "Pygments is a syntax highlighting package written in Python."
 name = "pygments"
+version = "2.5.2"
+description = "Pygments is a syntax highlighting package written in Python."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.5.2"
 
 [[package]]
-category = "main"
-description = "Python binding to the Networking and Cryptography (NaCl) library"
 name = "pynacl"
+version = "1.3.0"
+description = "Python binding to the Networking and Cryptography (NaCl) library"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.3.0"
 
 [package.dependencies]
 cffi = ">=1.4.1"
@@ -407,72 +405,69 @@ six = "*"
 
 [package.extras]
 docs = ["sphinx (>=1.6.5)", "sphinx-rtd-theme"]
-tests = ["pytest (>=3.2.1,<3.3.0 || >3.3.0)", "hypothesis (>=3.27.0)"]
+tests = ["pytest (>=3.2.1,!=3.3.0)", "hypothesis (>=3.27.0)"]
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.4.6"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.6"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "5.3.5"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "5.3.5"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 more-itertools = ">=4.0.0"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
 py = ">=1.5.0"
 wcwidth = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa-mypy = ["mypy (v0.761)"]
+checkqa-mypy = ["mypy (==v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
+version = "2.8.1"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8.1"
 
 [package.dependencies]
 coverage = ">=4.4"
 pytest = ">=3.6"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "virtualenv"]
+testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "virtualenv"]
 
 [[package]]
-category = "dev"
-description = "World timezone definitions, modern and historical"
 name = "pytz"
+version = "2019.3"
+description = "World timezone definitions, modern and historical"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2019.3"
 
 [[package]]
-category = "main"
-description = "Python HTTP for Humans."
 name = "requests"
+version = "2.22.0"
+description = "Python HTTP for Humans."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.22.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
@@ -482,76 +477,75 @@ urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
-category = "main"
-description = "A package for Recursive Length Prefix encoding and decoding"
 name = "rlp"
+version = "1.2.0"
+description = "A package for Recursive Length Prefix encoding and decoding"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.2.0"
 
 [package.dependencies]
 eth-utils = ">=1.0.2,<2"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "setuptools (>=36.2.0)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "twine", "pytest (3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (3.56.5)", "flake8 (3.4.1)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
+dev = ["bumpversion (>=0.5.3,<1)", "setuptools (>=36.2.0)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "twine", "pytest (==3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (==3.56.5)", "flake8 (==3.4.1)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (3.4.1)"]
-test = ["pytest (3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (3.56.5)"]
+lint = ["flake8 (==3.4.1)"]
+test = ["pytest (==3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (==3.56.5)"]
 
 [[package]]
-category = "main"
-description = "Python helper for Semantic Versioning (http://semver.org/)"
 name = "semver"
+version = "2.9.0"
+description = "Python helper for Semantic Versioning (http://semver.org/)"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2.9.0"
 
 [[package]]
-category = "main"
-description = "Simple, fast, extensible JSON encoder/decoder for Python"
 name = "simplejson"
+version = "3.17.0"
+description = "Simple, fast, extensible JSON encoder/decoder for Python"
+category = "main"
 optional = false
 python-versions = ">=2.5, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "3.17.0"
 
 [[package]]
-category = "main"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.14.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.14.0"
 
 [[package]]
-category = "dev"
-description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
 name = "snowballstemmer"
+version = "2.0.0"
+description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2.0.0"
 
 [[package]]
-category = "dev"
-description = "Python documentation generator"
 name = "sphinx"
+version = "2.3.1"
+description = "Python documentation generator"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "2.3.1"
 
 [package.dependencies]
-Jinja2 = ">=2.3"
-Pygments = ">=2.0"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3,<2.0 || >2.0"
-colorama = ">=0.3.5"
+colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
 docutils = ">=0.12"
 imagesize = "*"
+Jinja2 = ">=2.3"
 packaging = "*"
+Pygments = ">=2.0"
 requests = ">=2.5.0"
-setuptools = "*"
 snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
 sphinxcontrib-devhelp = "*"
@@ -565,111 +559,110 @@ docs = ["sphinxcontrib-websupport"]
 test = ["pytest", "pytest-cov", "html5lib", "flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.761)", "docutils-stubs"]
 
 [[package]]
-category = "dev"
-description = "Read the Docs theme for Sphinx"
 name = "sphinx-rtd-theme"
+version = "0.4.3"
+description = "Read the Docs theme for Sphinx"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.4.3"
 
 [package.dependencies]
 sphinx = "*"
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-applehelp"
+version = "1.0.1"
+description = ""
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-devhelp"
+version = "1.0.1"
+description = ""
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-htmlhelp"
+version = "1.0.2"
+description = ""
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.2"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy", "html5lib"]
 
 [[package]]
-category = "dev"
-description = "A sphinx extension which renders display math in HTML via JavaScript"
 name = "sphinxcontrib-jsmath"
+version = "1.0.1"
+description = "A sphinx extension which renders display math in HTML via JavaScript"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "1.0.1"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-qthelp"
+version = "1.0.2"
+description = ""
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.2"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "dev"
-description = ""
 name = "sphinxcontrib-serializinghtml"
+version = "1.1.3"
+description = ""
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.1.3"
 
 [package.extras]
 test = ["pytest", "flake8", "mypy"]
 
 [[package]]
-category = "main"
-description = "List processing tools and functional utilities"
-marker = "implementation_name == \"cpython\" or implementation_name == \"pypy\""
 name = "toolz"
+version = "0.10.0"
+description = "List processing tools and functional utilities"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.10.0"
 
 [[package]]
-category = "main"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
 name = "urllib3"
+version = "1.25.8"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "1.25.8"
 
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
-category = "main"
-description = "Python Data Validation for Humans™."
 name = "validators"
+version = "0.14.2"
+description = "Python Data Validation for Humans™."
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.14.2"
 
 [package.dependencies]
 decorator = ">=3.4.0"
@@ -679,37 +672,36 @@ six = ">=1.4.0"
 test = ["pytest (>=2.2.3)", "flake8 (>=2.4.0)", "isort (>=4.2.2)"]
 
 [[package]]
-category = "dev"
-description = "Measures number of Terminal column cells of wide-character codes"
 name = "wcwidth"
+version = "0.1.8"
+description = "Measures number of Terminal column cells of wide-character codes"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.1.8"
 
 [[package]]
-category = "main"
-description = "An implementation of the WebSocket Protocol (RFC 6455 & 7692)"
 name = "websockets"
+version = "8.1"
+description = "An implementation of the WebSocket Protocol (RFC 6455 & 7692)"
+category = "main"
 optional = false
 python-versions = ">=3.6.1"
-version = "8.1"
 
 [[package]]
-category = "main"
-description = "Module for decorators, wrappers and monkey patching."
 name = "wrapt"
+version = "1.11.2"
+description = "Module for decorators, wrappers and monkey patching."
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.11.2"
 
 [[package]]
-category = "dev"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "2.1.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "2.1.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
@@ -719,8 +711,9 @@ testing = ["jaraco.itertools"]
 test = []
 
 [metadata]
-content-hash = "9c146bf1228cd0a6692ad64c1fc2e54570e4e020961f31015d90fb0fd665341b"
+lock-version = "1.1"
 python-versions = "^3.7"
+content-hash = "295f7b91263c625abd217a71c4da8f017969833c86f3cbd2d6e5b801b92ce675"
 
 [metadata.files]
 alabaster = [
@@ -787,8 +780,8 @@ chardet = [
     {file = "chardet-3.0.4.tar.gz", hash = "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"},
 ]
 click = [
-    {file = "Click-7.0-py2.py3-none-any.whl", hash = "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13"},
-    {file = "Click-7.0.tar.gz", hash = "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"},
+    {file = "click-8.0.1-py3-none-any.whl", hash = "sha256:fba402a4a47334742d782209a7c79bc448911afe1149d07bdabdf480b3e2f4b6"},
+    {file = "click-8.0.1.tar.gz", hash = "sha256:8c04c11192119b1ef78ea049e0a6f0463e4c48ef00a30160c704337586f3ad7a"},
 ]
 colorama = [
     {file = "colorama-0.4.3-py2.py3-none-any.whl", hash = "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff"},
@@ -901,20 +894,39 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp35-cp35m-win32.whl", hash = "sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1"},
     {file = "MarkupSafe-1.1.1-cp35-cp35m-win_amd64.whl", hash = "sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-macosx_10_6_intel.whl", hash = "sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:3b8a6499709d29c2e2399569d96719a1b21dcd94410a586a18526b143ec8470f"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:84dee80c15f1b560d55bcfe6d47b27d070b4681c699c572af2e3c7cc90a3b8e0"},
+    {file = "MarkupSafe-1.1.1-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:b1dba4527182c95a0db8b6060cc98ac49b9e2f5e64320e2b56e47cb2831978c7"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-win32.whl", hash = "sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66"},
     {file = "MarkupSafe-1.1.1-cp36-cp36m-win_amd64.whl", hash = "sha256:b1282f8c00509d99fef04d8ba936b156d419be841854fe901d8ae224c59f0be5"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-macosx_10_6_intel.whl", hash = "sha256:8defac2f2ccd6805ebf65f5eeb132adcf2ab57aa11fdf4c0dd5169a004710e7d"},
+    {file = "MarkupSafe-1.1.1-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:bf5aa3cbcfdf57fa2ee9cd1822c862ef23037f5c832ad09cfea57fa846dec193"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6"},
+    {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux2010_i686.whl", hash = "sha256:6fffc775d90dcc9aed1b89219549b329a9250d918fd0b8fa8d93d154918422e1"},
+    {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:a6a744282b7718a2a62d2ed9d993cad6f5f585605ad352c11de459f4108df0a1"},
+    {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux2014_aarch64.whl", hash = "sha256:195d7d2c4fbb0ee8139a6cf67194f3973a6b3042d742ebe0a9ed36d8b6f0c07f"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win32.whl", hash = "sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_i686.whl", hash = "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2010_i686.whl", hash = "sha256:acf08ac40292838b3cbbb06cfe9b2cb9ec78fce8baca31ddb87aaac2e2dc3bc2"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:d9be0ba6c527163cbed5e0857c451fcd092ce83947944d6c14bc95441203f032"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux2014_aarch64.whl", hash = "sha256:caabedc8323f1e93231b52fc32bdcde6db817623d33e100708d9a68e1f53b26b"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-win32.whl", hash = "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b"},
     {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:d73a845f227b0bfe8a7455ee623525ee656a9e2e749e4742706d80a6065d5e2c"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux1_i686.whl", hash = "sha256:98bae9582248d6cf62321dcb52aaf5d9adf0bad3b40582925ef7c7f0ed85fceb"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:2beec1e0de6924ea551859edb9e7679da6e4870d32cb766240ce17e0a0ba2014"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2010_i686.whl", hash = "sha256:7fed13866cf14bba33e7176717346713881f56d9d2bcebab207f7a036f41b850"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:6f1e273a344928347c1290119b493a1f0303c52f5a5eae5f16d74f48c15d4a85"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:feb7b34d6325451ef96bc0e36e1a6c0c1c64bc1fbec4b854f4529e51887b1621"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-win32.whl", hash = "sha256:22c178a091fc6630d0d045bdb5992d2dfe14e3259760e713c490da5323866c39"},
+    {file = "MarkupSafe-1.1.1-cp39-cp39-win_amd64.whl", hash = "sha256:b7d644ddb4dbd407d31ffb699f1d140bc35478da613b441c582aeb7c43838dd8"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 mccabe = [
diff --git a/pyproject.toml b/pyproject.toml
index 456e8e3b..08380eea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ packages = [
 [tool.poetry.dependencies]
 python = "^3.7"
 base58 = ">=1,<3"
-click = "^7.0"
+click = ">=7,<9"
 rlp = "^1.1"
 PyNaCl = "^1.3"
 requests = "^2.20"