diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 00000000..0aaa0144
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,67 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ develop ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ develop ]
+  schedule:
+    - cron: '22 14 * * 2'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'python' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 00000000..ed6903ea
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,19 @@
+name: Publish to PyPI
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  pypi_release:
+    name: Build with Poetry and Publish to PyPI
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+      - name: Install and configure Poetry
+        run: |
+          pip install poetry
+          poetry config pypi-token.pypi "${{ secrets.PYPI_TOKEN }}"
+      - name: Publish package
+        run: poetry publish --build
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..55c9e1e8
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,44 @@
+name: Test
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - 3.6
+          - 3.7
+          - 3.8
+          - 3.9
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Get full python version
+        id: full-python-version
+        run: |
+          echo ::set-output name=version::$(python -c "import sys; print('-'.join(str(v) for v in sys.version_info[:3]))")
+      - name: Set up cache
+        uses: actions/cache@v2
+        with:
+          path: .venv
+          key: ${{ runner.os }}-venv-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('**/poetry.lock') }}
+      - name: Install and configure Poetry
+        run: |
+          pip install poetry
+          poetry config virtualenvs.in-project true
+      - name: Install dependencies
+        run: poetry install
+      - name: Run pytest
+        run: |
+          poetry run pytest -vvv -ra --cov=cryptojwt --cov-report=xml --isort --black
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 4da6eb14..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-sudo: false
-language: python
-cache: pip
-python:
-  - 3.6
-  - 3.7
-  - 3.8
-  - 3.9-dev
-addons:
-  apt:
-    packages:
-      -
-install:
-  - pip install codecov
-  - pip install tox tox-travis
-script:
-  - codecov --version
-  - tox
-after_success:
-  - codecov
-notifications:
-  email: true
-deploy:
-  provider: pypi
-  on:
-    tags: true
-  distributions: "sdist bdist_wheel"
-  skip_existing: true
-  username: __token__
-  password:
-    secure: sCvQSnLW2R9i01dTvG1JyZ+lU99jXjEmPeniSTB8SAZMlfIbuo8I5kjkKxxaa4uTOU3mZiWDG/wq/liUuUzxjXYLA47gwVqU6QrkgIh0/QqGIN1+GYtHqZZETueGClSS8drCgYchpknNTA+30JL/kpt4fjq5hSUFII5BuybVYbh5WVnmwjhZOnZdKxVuQrrfzNVe14wr/TY7VvtL7W5bSCigxYh4oSUiFB6WkFyPZFetqYRO5eCTRt4Tn/hT3Y5Aiz033hMFhrjB4XxuWK7P1f6WVVGRMfAwa4XuC3w0oPSp/9I0cMBtLkExs+tdq25lgmJOcdzVwo3QHPs4pn6AjHKPyoTr/jiuysKnSZCwgcMPFpORgrOWQh/qFxHqNFI0QzNasZXhEBDJaaR2pN/GLjW97NiuaCFuZ/me0SWtpdhPuJpjgx9xxwymRRC4aBu6aPrzoxFGABp4Bkica7KsBmWgQ0ZFMPO6bXB6bU5w8a+wlOY/6I8b06/cIOIyMh8Tas7UwO2/e0L65qhAkR3u1evmagex94w9UameP+518yYik0L5uwrn7vPeRNpH1UEctd3RG73HlEdu8wMCo0pPrvFqsQGtIiPTLPx99453z8Z/raWwAa1Zpn2c8mSm9YIOQZ20rsiFy1vfwAm2b7/dfm005hUirmfwtiG7Oq8iLdg=
diff --git a/README.md b/README.md
index 2dd71517..cc6284c4 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # cryptojwt
 
 ![License](https://img.shields.io/badge/license-Apache%202-blue.svg)
-![Python version](https://img.shields.io/badge/python-3.6%20%7C%203.7%203.8-blue.svg)
+![Python version](https://img.shields.io/badge/python-3.6%20%7C%203.7%7C%203.8%20%7C%203.9-blue.svg)
 
 An implementation of the JSON cryptographic specs JWS, JWE, JWK, and JWA [RFC 7515-7518] and JSON Web Token (JWT) [RFC 7519]
 
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 00000000..d1495f92
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,1094 @@
+[[package]]
+name = "alabaster"
+version = "0.7.12"
+description = "A configurable sidebar-enabled Sphinx theme"
+category = "dev"
+optional = false
+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 = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "attrs"
+version = "20.3.0"
+description = "Classes Without Boilerplate"
+category = "dev"
+optional = false
+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 = "dev"
+optional = false
+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 = "dev"
+optional = false
+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"
+pathspec = ">=0.6,<1"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
+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 = false
+python-versions = "*"
+
+[[package]]
+name = "cffi"
+version = "1.14.5"
+description = "Foreign Function Interface for Python calling C code."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+pycparser = "*"
+
+[[package]]
+name = "chardet"
+version = "4.0.0"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "click"
+version = "7.1.2"
+description = "Composable command line interface toolkit"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "codecov"
+version = "2.1.11"
+description = "Hosted coverage reports for GitHub, Bitbucket and Gitlab"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+coverage = "*"
+requests = ">=2.7.9"
+
+[[package]]
+name = "colorama"
+version = "0.4.4"
+description = "Cross-platform colored terminal text."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "coverage"
+version = "5.5"
+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"
+
+[package.extras]
+toml = ["toml"]
+
+[[package]]
+name = "cryptography"
+version = "3.4.6"
+description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.12"
+
+[package.extras]
+docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
+docstest = ["doc8", "pyenchant (>=1.6.11)", "twine (>=1.12.0)", "sphinxcontrib-spelling (>=4.0.1)"]
+pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["pytest (>=6.0)", "pytest-cov", "pytest-subtests", "pytest-xdist", "pretend", "iso8601", "pytz", "hypothesis (>=1.11.4,!=3.79.2)"]
+
+[[package]]
+name = "dataclasses"
+version = "0.8"
+description = "A backport of the dataclasses module for Python 3.6"
+category = "dev"
+optional = false
+python-versions = ">=3.6, <3.7"
+
+[[package]]
+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.*"
+
+[[package]]
+name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+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 = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "importlib-metadata"
+version = "3.7.3"
+description = "Read metadata from Python packages"
+category = "dev"
+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 = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "isort"
+version = "5.7.0"
+description = "A Python utility / library to sort Python imports."
+category = "dev"
+optional = false
+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]]
+name = "jinja2"
+version = "2.11.3"
+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.*"
+
+[package.dependencies]
+MarkupSafe = ">=0.23"
+
+[package.extras]
+i18n = ["Babel (>=0.8)"]
+
+[[package]]
+name = "livereload"
+version = "2.6.3"
+description = "Python LiveReload is an awesome tool for web developers"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = "*"
+tornado = {version = "*", markers = "python_version > \"2.7\""}
+
+[[package]]
+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.*"
+
+[[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "packaging"
+version = "20.9"
+description = "Core utilities for Python packages"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
+
+[[package]]
+name = "pathspec"
+version = "0.8.1"
+description = "Utility library for gitignore style pattern matching of file paths."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+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.*"
+
+[package.dependencies]
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+
+[[package]]
+name = "py"
+version = "1.10.0"
+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.*"
+
+[[package]]
+name = "pycparser"
+version = "2.20"
+description = "C parser in Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pygments"
+version = "2.8.1"
+description = "Pygments is a syntax highlighting package written in Python."
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "pytest"
+version = "6.2.2"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
+optional = false
+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-black"
+version = "0.3.12"
+description = "A pytest plugin to enable format checking with black"
+category = "dev"
+optional = false
+python-versions = ">=2.7"
+
+[package.dependencies]
+black = {version = "*", markers = "python_version >= \"3.6\""}
+pytest = ">=3.5.0"
+toml = "*"
+
+[[package]]
+name = "pytest-cov"
+version = "2.11.1"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
+optional = false
+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 = "pytest-isort"
+version = "1.3.0"
+description = "py.test plugin to check import ordering using isort"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+isort = ">=4.0"
+
+[package.extras]
+tests = ["mock"]
+
+[[package]]
+name = "pytz"
+version = "2021.1"
+description = "World timezone definitions, modern and historical"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "regex"
+version = "2020.11.13"
+description = "Alternative regular expression module, to replace re."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "requests"
+version = "2.25.1"
+description = "Python HTTP for Humans."
+category = "main"
+optional = false
+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 = "responses"
+version = "0.13.0"
+description = "A utility library for mocking out the `requests` Python library."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+requests = ">=2.0"
+six = "*"
+urllib3 = ">=1.25.10"
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diff --git a/pyproject.toml b/pyproject.toml
index d639eb5e..4527577c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,3 +19,43 @@ exclude_lines = [
     "pragma: no cover",
     "raise NotImplementedError",
 ]
+
+[tool.poetry]
+name = "cryptojwt"
+version = "1.4.1"
+description = "Python implementation of JWT, JWE, JWS and JWK"
+authors = ["Roland Hedberg <roland@catalogix.se>"]
+license = "Apache-2.0"
+repository = "https://github.com/IdentityPython/JWTConnect-Python-CryptoJWT"
+readme = "README.md"
+packages = [
+    { include = "cryptojwt", from = "src" }
+]
+
+[tool.poetry.scripts]
+jwkgen = "cryptojwt.tools.keygen:main"
+jwkconv = "cryptojwt.tools.keyconv:main"
+jwtpeek = "cryptojwt.tools.jwtpeek:main"
+
+[tool.poetry.dependencies]
+python = "^3.6"
+cryptography = "^3.4.6"
+requests = "^2.25.1"
+
+[tool.poetry.dev-dependencies]
+alabaster = "^0.7.12"
+black = "^20.8b1"
+isort = "^5.6.4"
+pytest = "^6.1.2"
+pytest-black = "^0.3.12"
+pytest-isort = "^1.2.0"
+responses = "^0.13.0"
+sphinx = "^3.5.2"
+sphinx-autobuild = "^2021.3.14"
+pytest-cov = "^2.11.1"
+codecov = "^2.1.11"
+coverage = "^5.5"
+
+[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 d62ad040..00000000
--- a/setup.py
+++ /dev/null
@@ -1,71 +0,0 @@
-#!/usr/bin/python
-#
-# Copyright (C) 2017 Roland Hedberg
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-import glob
-import re
-
-from setuptools import setup
-
-__author__ = "Roland Hedberg"
-
-with open("src/cryptojwt/__init__.py", "r") as fd:
-    version = re.search(r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', fd.read(), re.MULTILINE).group(1)
-
-tests_requires = ["responses", "pytest", "isort>=5.0.2", "black"]
-
-setup(
-    name="cryptojwt",
-    version=version,
-    description="Python implementation of JWT, JWE, JWS and JWK",
-    author="Roland Hedberg",
-    author_email="roland@catalogix.se",
-    license="Apache 2.0",
-    packages=[
-        "cryptojwt",
-        "cryptojwt/jwe",
-        "cryptojwt/jwk",
-        "cryptojwt/jws",
-        "cryptojwt/tools",
-        "cryptojwt/serialize",
-    ],
-    package_dir={"": "src"},
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "License :: OSI Approved :: Apache Software License",
-        "Topic :: Software Development :: Libraries :: Python Modules",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-    ],
-    install_requires=["cryptography", "requests"],
-    tests_require=["pytest"],
-    zip_safe=False,
-    extras_require={
-        "testing": tests_requires,
-        "docs": ["Sphinx", "sphinx-autobuild", "alabaster"],
-        "quality": ["isort>=5.0.2", "black"],
-    },
-    scripts=glob.glob("script/*.py"),
-    entry_points={
-        "console_scripts": [
-            "jwkgen = cryptojwt.tools.keygen:main",
-            "jwkconv = cryptojwt.tools.keyconv:main",
-            "jwtpeek = cryptojwt.tools.jwtpeek:main",
-        ]
-    },
-)
diff --git a/src/cryptojwt/__init__.py b/src/cryptojwt/__init__.py
index afe11db1..a89d055d 100644
--- a/src/cryptojwt/__init__.py
+++ b/src/cryptojwt/__init__.py
@@ -1,6 +1,8 @@
 """JSON Web Token"""
 import logging
 
+import pkg_resources
+
 from cryptojwt.jwe.jwe import JWE
 from cryptojwt.jwk import JWK
 from cryptojwt.jws.jws import JWS
@@ -21,7 +23,7 @@
 except ImportError:
     pass
 
-__version__ = "1.4.0"
+__version__ = pkg_resources.get_distribution("cryptojwt").version
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/cryptojwt/jwk/hmac.py b/src/cryptojwt/jwk/hmac.py
index a0ffda0f..70da83f2 100644
--- a/src/cryptojwt/jwk/hmac.py
+++ b/src/cryptojwt/jwk/hmac.py
@@ -57,7 +57,7 @@ def __init__(
             self.key = b64d(bytes(self.k))
 
         if len(self.key) < 16:
-            raise UnsupportedAlgorithm("key too short")
+            raise UnsupportedAlgorithm("client_secret too short, it should be at least 16 digits")
 
     def deserialize(self):
         self.key = b64d(bytes(self.k))
diff --git a/src/cryptojwt/jws/dsa.py b/src/cryptojwt/jws/dsa.py
index 796146b2..dc780ad2 100644
--- a/src/cryptojwt/jws/dsa.py
+++ b/src/cryptojwt/jws/dsa.py
@@ -3,7 +3,6 @@
 from cryptography.hazmat.primitives.asymmetric import ec
 from cryptography.hazmat.primitives.asymmetric.utils import decode_dss_signature
 from cryptography.hazmat.primitives.asymmetric.utils import encode_dss_signature
-from cryptography.utils import int_from_bytes
 from cryptography.utils import int_to_bytes
 
 from ..exception import BadSignature
@@ -102,6 +101,6 @@ def _split_raw_signature(sig):
         :return: A 2-tuple
         """
         c_length = len(sig) // 2
-        r = int_from_bytes(sig[:c_length], byteorder="big")
-        s = int_from_bytes(sig[c_length:], byteorder="big")
+        r = int.from_bytes(sig[:c_length], byteorder="big")
+        s = int.from_bytes(sig[c_length:], byteorder="big")
         return r, s
diff --git a/tests/test_09_jwt.py b/tests/test_09_jwt.py
index 71b019d5..d016b211 100755
--- a/tests/test_09_jwt.py
+++ b/tests/test_09_jwt.py
@@ -3,7 +3,6 @@
 import pytest
 
 from cryptojwt.exception import IssuerNotFound
-from cryptojwt.exception import JWKESTException
 from cryptojwt.jws.exception import NoSuitableSigningKeys
 from cryptojwt.jwt import JWT
 from cryptojwt.jwt import pick_key
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 272756a9..00000000
--- a/tox.ini
+++ /dev/null
@@ -1,31 +0,0 @@
-[tox]
-envlist = py{36,37,38},quality
-
-[testenv]
-passenv = CI TRAVIS TRAVIS_*
-commands =
-    pytest -vvv -ra --cov=cryptojwt --isort --black {posargs}
-    codecov
-extras = testing
-deps =
-  codecov
-  pytest-black
-  pytest-cov
-  pytest-httpserver
-  pytest-isort
-
-[pep8]
-max-line-length=100
-
-[pytest]
-addopts = --color=yes
-markers = network
-
-[testenv:quality]
-basepython = python3.8
-ignore_errors = True
-deps = twine
-extras = quality
-commands =
-    isort --check --diff src tests
-    black --check src tests