diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ab0b4e56..0e38ecf8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -28,6 +28,10 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11-dev"
+          - "pypy-2.7"
+          - "pypy-3.7"
+          - "pypy-3.8"
+          - "pypy-3.9"
     steps:
       - uses: "actions/checkout@v3"
       - uses: "actions/setup-python@v4"
@@ -40,3 +44,34 @@ jobs:
         run: python -m pip install --upgrade tox tox-gh-actions
       - name: "Run tox for ${{ matrix.python-version }}"
         run: "python -m tox"
+
+  sdist:
+    name: "Build sdist and wheel"
+    runs-on: "ubuntu-latest"
+    needs: tests
+    steps:
+      - uses: "actions/checkout@v3"
+      - uses: "actions/setup-python@v4"
+        with:
+          python-version: "3.10"
+          cache: "pip"
+      - name: "Update pip"
+        run: python -m pip install --upgrade pip setuptools wheel
+      - name: "Install 'build'"
+        run: python -m pip install --upgrade build
+      - name: "Run 'build'"
+        run: "python -m build"
+      - name: "Upload sdist artifact"
+        uses: actions/upload-artifact@v2
+        with:
+          name: sdist
+          path: |
+            dist/pyasn1*.tar.gz
+          if-no-files-found: error
+      - name: "Upload wheel artifact"
+        uses: actions/upload-artifact@v2
+        with:
+          name: wheel
+          path: |
+            dist/pyasn1*.whl
+          if-no-files-found: error
diff --git a/.gitignore b/.gitignore
index 46547076..029a5d60 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 *.pyc
 __pycache__
+.tox
+.coverage
 
 # vim swapfiles
 *.sw?
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 59bb9fda..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-language: python
-cache: pip
-matrix:
-  include:
-  - python: '2.7'
-  - python: '3.5'
-  - python: '3.6'
-  - python: '3.7'
-  - python: '3.8'
-  - python: 'nightly'
-  - python: 'pypy'
-  - python: 'pypy3'
-install:
-  - pip install codecov
-  - pip install -r requirements.txt
-  - pip install -e .
-script:
-  - PYTHONPATH=.:$PYTHONPATH python tests/__main__.py
-after_success:
-  - PYTHONPATH=.:$PYTHONPATH coverage run --omit=*test* tests/__main__.py
-  - codecov
diff --git a/CHANGES.txt b/CHANGES.txt
index b9535c0e..2cb81e85 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,8 +1,12 @@
-
-Revision 0.3.0, released XX-03-2020
+Revision 0.3.0, released XX-08-2028
 -----------------------------------
 
-- Added support for Python 3.8.
+- Added support for Python 3.8, 3.9, 3.10, 3.11
+- Removed support for EOL Pythons 2.4, 2.5, 2.6, 3.2, 3.3, 3.4, 3.5
+- Added support for PyPy 3.7, 3.8, 3.9
+- Modernized packaging and testing. pyasn1-modules now uses ``setup.cfg``,
+  ``pyproject.toml``, [build](https://pypi.org/project/build/), and
+  GitHub Actions.
 - Added tox runner with a handful of basic jobs
 - Add RFC3125 providing Electronic Signature Policies
 - Add RFC5126 providing CMS Advanced Electronic Signatures (CAdES)
diff --git a/README.md b/README.md
index baa11c71..29953a5e 100644
--- a/README.md
+++ b/README.md
@@ -3,13 +3,13 @@ ASN.1 modules for Python
 ------------------------
 [![PyPI](https://img.shields.io/pypi/v/pyasn1-modules.svg?maxAge=2592000)](https://pypi.org/project/pyasn1-modules)
 [![Python Versions](https://img.shields.io/pypi/pyversions/pyasn1-modules.svg)](https://pypi.org/project/pyasn1-modules/)
-[![Build status](https://travis-ci.org/etingof/pyasn1-modules.svg?branch=master)](https://travis-ci.org/etingof/pyasn1-modules)
-[![Coverage Status](https://img.shields.io/codecov/c/github/etingof/pyasn1-modules.svg)](https://codecov.io/github/etingof/pyasn1-modules/)
-[![GitHub license](https://img.shields.io/badge/license-BSD-blue.svg)](https://raw.githubusercontent.com/etingof/pyasn1-modules/master/LICENSE.txt)
+[![Build status](https://github.com/pyasn1/pyasn1-modules/actions/workflows/main.yml/badge.svg)](https://github.com/pyasn1/pyasn1-modules/actions/workflows/main.yml)
+[![Coverage Status](https://img.shields.io/codecov/c/github/pyasn1/pyasn1-modules.svg)](https://codecov.io/github/pyasn1/pyasn1-modules)
+[![GitHub license](https://img.shields.io/badge/license-BSD-blue.svg)](https://raw.githubusercontent.com/pyasn1/pyasn1-modules/master/LICENSE.txt)
 
 The `pyasn1-modules` package contains a collection of
 [ASN.1](https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.208-198811-W!!PDF-E&type=items)
-data structures expressed as Python classes based on [pyasn1](https://github.com/etingof/pyasn1)
+data structures expressed as Python classes based on [pyasn1](https://github.com/pyasn1/pyasn1)
 data model.
 
 If ASN.1 module you need is not present in this collection, try using
@@ -20,7 +20,7 @@ Feedback
 --------
 
 If something does not work as expected, 
-[open an issue](https://github.com/etingof/pyasn1-modules/issues) at GitHub
+[open an issue](https://github.com/pyasn1/pyasn1-modules/issues) at GitHub
 or post your question [on Stack Overflow](https://stackoverflow.com/questions/ask)
  
 New modules contributions are welcome via GitHub pull requests.
diff --git a/pyasn1_modules/__init__.py b/pyasn1_modules/__init__.py
index 95a220ef..41dd7c58 100644
--- a/pyasn1_modules/__init__.py
+++ b/pyasn1_modules/__init__.py
@@ -1,2 +1,2 @@
 # http://www.python.org/dev/peps/pep-0396/
-__version__ = '0.3.0'
+__version__ = '0.3.0.dev1'
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..e3d7c965
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,5 @@
+[build-system]
+requires = [
+    "setuptools"
+]
+build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
index 2e9053c0..24933ec8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,54 @@
-[bdist_wheel]
-universal = 1
-
 [metadata]
+name = pyasn1_modules
+version = attr: pyasn1_modules.__version__
+description = A collection of ASN.1-based protocols modules
+long_description = file: README.md
+long_description_content_type = text/markdown
+license = BSD
 license_file = LICENSE.txt
+url = https://github.com/pyasn1/pyasn1-modules
+author = Ilya Etingof
+author_email = etingof@gmail.com
+maintainer = pyasn1 maintenance organization
+maintainer_email = Christian Heimes <christian@python.org>
+project_urls =
+    Source=https://github.com/pyasn1/pyasn1-modules
+    Issues=https://github.com/pyasn1/pyasn1-modules/issues
+    Changelog=https://github.com/pyasn1/pyasn1-modules/blob/master/CHANGES.txt
+platforms = any
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Environment :: Console
+    Intended Audience :: Developers
+    Intended Audience :: Education
+    Intended Audience :: Information Technology
+    Intended Audience :: System Administrators
+    Intended Audience :: Telecommunications Industry
+    License :: OSI Approved :: BSD License
+    Natural Language :: English
+    Operating System :: OS Independent
+    Programming Language :: Python :: 2
+    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Topic :: Communications
+    Topic :: Software Development :: Libraries :: Python Modules
+
+[options]
+python_requires = >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*
+zip_safe = True
+setup_requires = setuptools
+install_requires =
+    pyasn1>=0.4.6,<0.6.0
+packages =
+    pyasn1_modules
+
+[bdist_wheel]
+universal = 1
diff --git a/setup.py b/setup.py
index efbef7a3..d7b3b238 100644
--- a/setup.py
+++ b/setup.py
@@ -5,121 +5,6 @@
 # Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
 # License: http://snmplabs.com/pyasn1/license.html
 #
-import sys
-import unittest
+from setuptools import setup
 
-
-doclines = """A collection of ASN.1-based protocols modules.
-
-   A collection of ASN.1 modules expressed in form of pyasn1 classes.
-   Includes protocols PDUs definition (SNMP, LDAP etc.) and various
-   data structures (X.509, PKCS etc.).
-"""
-
-doclines = [x.strip() for x in doclines.split('\n') if x]
-
-
-classifiers = """\
-Development Status :: 5 - Production/Stable
-Environment :: Console
-Intended Audience :: Developers
-Intended Audience :: Education
-Intended Audience :: Information Technology
-Intended Audience :: System Administrators
-Intended Audience :: Telecommunications Industry
-License :: OSI Approved :: BSD License
-Natural Language :: English
-Operating System :: OS Independent
-Programming Language :: Python :: 2
-Programming Language :: Python :: 2.7
-Programming Language :: Python :: 3
-Programming Language :: Python :: 3.5
-Programming Language :: Python :: 3.6
-Programming Language :: Python :: 3.7
-Programming Language :: Python :: 3.8
-Programming Language :: Python :: 3.9
-Programming Language :: Python :: 3.10
-Programming Language :: Python :: 3.11
-Topic :: Communications
-Topic :: System :: Monitoring
-Topic :: System :: Networking :: Monitoring
-Topic :: Software Development :: Libraries :: Python Modules
-"""
-
-
-def howto_install_setuptools():
-    print("""
-   Error: You need setuptools Python package!
-
-   It's very easy to install it, just type (as root on Linux):
-
-   wget https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py
-   python ez_setup.py
-
-   Then you could make eggs from this package.
-""")
-
-
-if sys.version_info[:2] < (2, 7):
-    print("ERROR: this package requires Python 2.7 or later!")
-    sys.exit(1)
-
-try:
-    from setuptools import setup, Command
-
-    params = {
-        'zip_safe': True,
-        'install_requires': ['pyasn1>=0.4.6,<0.6.0']
-    }
-
-except ImportError:
-    for arg in sys.argv:
-        if 'egg' in arg:
-            howto_install_setuptools()
-            sys.exit(1)
-
-    from distutils.core import setup, Command
-
-    params = {
-        'requires': ['pyasn1(>=0.4.6,<0.6.0)']
-    }
-
-params.update(
-    {'name': 'pyasn1-modules',
-     'version': open('pyasn1_modules/__init__.py').read().split('\'')[1],
-     'description': doclines[0],
-     'long_description': ' '.join(doclines[1:]),
-     'maintainer': 'Ilya Etingof <etingof@gmail.com>',
-     'author': 'Ilya Etingof',
-     'author_email': 'etingof@gmail.com',
-     'url': 'https://github.com/etingof/pyasn1-modules',
-     'platforms': ['any'],
-     'python_requires': '>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
-     'classifiers': [x for x in classifiers.split('\n') if x],
-     'license': 'BSD-2-Clause',
-     'packages': ['pyasn1_modules'],
-     'python_requires': '>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*'})
-
-
-class PyTest(Command):
-    user_options = []
-
-    def initialize_options(self):
-        pass
-
-    def finalize_options(self):
-        pass
-
-    def run(self):
-        suite = unittest.TestLoader().loadTestsFromNames(
-            ['tests.__main__.suite']
-        )
-
-        unittest.TextTestRunner(verbosity=2).run(suite)
-
-params['cmdclass'] = {
-    'test': PyTest,
-    'tests': PyTest
-}
-
-setup(**params)
+setup()
diff --git a/tests/test_missing.py b/tests/test_missing.py
new file mode 100644
index 00000000..0b3f58a7
--- /dev/null
+++ b/tests/test_missing.py
@@ -0,0 +1,18 @@
+#
+# This file is part of pyasn1-modules software.
+#
+import sys
+import unittest
+
+# modules without tests
+from pyasn1_modules import (
+    rfc1155, rfc1157, rfc1901, rfc3412, rfc3414
+)
+
+suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
+
+if __name__ == '__main__':
+    import sys
+
+    result = unittest.TextTestRunner(verbosity=2).run(suite)
+    sys.exit(not result.wasSuccessful())
diff --git a/tox.ini b/tox.ini
index 4e831d14..38d022eb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,69 +1,21 @@
 [tox]
-minversion = 3.4.0
+minversion = 3.5.0
 envlist =
-    {py27, py35, py36, py37, py38, py39, py310, py311}-{unittest},
+    py27, py36, py37, py38, py39, py310, py311, pypy27, pypy37, pypy38, pypy39
     cover, bandit, build
 isolated_build = true
 skip_missing_interpreters = true
 
 [testenv]
-usedevelop = True
-setenv =
-    VIRTUAL_ENV={envdir}
-    PYTHONWARNINGS=default::DeprecationWarning
-deps = pip >= 19.3.1
-install_command =
-    pip install {opts} {packages}
-
-[testenv:unittest]
-deps =
-    {[testenv]deps}
-    discover
-    -r{toxinidir}/requirements.txt
 commands =
-    discover -s examples/pyasn1_modules-example-switch/tests -s tests
-
-[testenv:py27-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py35-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py36-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py37-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py38-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py39-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py310-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
-
-[testenv:py311-unittest]
-deps = {[testenv:unittest]deps}
-commands = {[testenv:unittest]commands}
+    {envpython} -m unittest discover -s tests
+deps =
+    pyasn1>=0.4.6,<0.6.0
 
 [testenv:cover]
 basepython = python3
-setenv =
-    {[testenv]setenv}
-    PYTHON=coverage run --parallel-mode
 deps =
-    {[testenv:unittest]deps}
     coverage
-    discover
 commands = coverage erase
            coverage run --source pyasn1_modules -m unittest discover {posargs}
            coverage report --fail-under 93
@@ -73,22 +25,28 @@ skip_install = true
 deps =
     bandit
 commands =
-    bandit -r pyasn1_modules -c .bandit.yml
+    bandit -r pyasn1 -c .bandit.yml
 
 [testenv:build]
 skip_install = true
 deps =
-    wheel
-    setuptools
+    build
+    twine
 commands =
-    python setup.py -q sdist bdist_wheel
+    {envpython} -m build
+    {envpython} -m twine check --strict dist/pyasn1_modules*.whl
+    {envpython} -m twine check --strict dist/pyasn1_modules*.tar.gz
 
 [gh-actions]
 python =
-    2.7: py27-unittest
-    3.6: py36-unittest
-    3.7: py37-unittest
-    3.8: py38-unittest
-    3.9: py39-unittest, bandit
-    3.10: py310-unittest, cover, build
-    3.11: py311-unittest
+    2.7: py27
+    3.6: py36
+    3.7: py37
+    3.8: py38
+    3.9: py39
+    3.10: py310, cover, build, bandit
+    3.11: py311
+    pypy-2.7: pypy27
+    pypy-3.7: pypy37
+    pypy-3.8: pypy38
+    pypy-3.9: pypy39