diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 0000000..fa172c1
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,58 @@
+name: Python package
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  lint:
+    name: "flake8 on code"
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.ref }}
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+          allow-prereleases: true
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install flake8
+      - name: Run flake8
+        shell: bash
+        run: |
+          flake8
+
+  test:
+    needs: [ lint ]
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements-dev.txt
+
+      - name: Test
+        run: |
+          make coverage
diff --git a/.gitignore b/.gitignore
index ce09cfb..861d6b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ dist
 *.swp
 doc/_build
 *.egg-info
+.idea
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 0000000..b8c2f2b
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,22 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: doc/conf.py
+
+# We recommend specifying your dependencies to enable reproducible builds:
+# https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+# python:
+#   install:
+#   - requirements: docs/requirements.txt
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 62ad875..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-language: python
-python:
-- '2.7'
-- '3.5'
-- '3.6'
-- '3.7'
-- '3.8'
-- '3.9'
-- 3.10-dev
-- nightly
-- pypy3
-install:
-- travis_retry pip install coveralls
-script:
-- coverage run --source=jsonpointer tests.py
-after_script:
-- coveralls
-sudo: false
-addons:
-  apt:
-    packages:
-    - pandoc
-before_deploy:
-- pip install -r requirements-dev.txt
-deploy:
-  provider: pypi
-  user: skoegl
-  password:
-    secure: bKET/1sK+uWetPM3opPTt4qHHfZ6bMcjuLGe3Z/EUfNnGazcbDezy9CHJSqofuMXynF3xc8yluEojjfaqos3Ge/Y4o8pdFMY8ABp8KkxMnAJYGtYzbneSHgdgxPKsmdcUMVtIfioqkeNJTJClWUhRikWSlpKZ7TtkK4AmWtKNwc=
-  on:
-    tags: true
-  distributions: sdist bdist_wheel
diff --git a/README.md b/README.md
index 210b07b..06c8aef 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,6 @@ python-json-pointer
 
 [![PyPI version](https://img.shields.io/pypi/v/jsonpointer.svg)](https://pypi.python.org/pypi/jsonpointer/)
 [![Supported Python versions](https://img.shields.io/pypi/pyversions/jsonpointer.svg)](https://pypi.python.org/pypi/jsonpointer/)
-[![Build Status](https://travis-ci.org/stefankoegl/python-json-pointer.svg?branch=master)](https://travis-ci.org/stefankoegl/python-json-pointer)
 [![Coverage Status](https://coveralls.io/repos/stefankoegl/python-json-pointer/badge.svg?branch=master)](https://coveralls.io/r/stefankoegl/python-json-pointer?branch=master)
 
 
diff --git a/bin/jsonpointer b/bin/jsonpointer
index d577d01..ba2117c 100755
--- a/bin/jsonpointer
+++ b/bin/jsonpointer
@@ -1,14 +1,12 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-from __future__ import print_function
 
-import sys
-import os.path
-import json
-import jsonpointer
 import argparse
+import json
+import sys
 
+import jsonpointer
 
 parser = argparse.ArgumentParser(
     description='Resolve a JSON pointer on JSON files')
@@ -20,7 +18,7 @@ ptr_group.add_argument('-f', '--pointer-file', type=argparse.FileType('r'),
                        nargs='?',
                        help='File containing a JSON pointer expression')
 
-ptr_group.add_argument('POINTER',  type=str, nargs='?',
+ptr_group.add_argument('POINTER', type=str, nargs='?',
                        help='A JSON pointer expression')
 
 parser.add_argument('FILE', type=argparse.FileType('r'), nargs='+',
diff --git a/jsonpointer.py b/jsonpointer.py
index b45684d..3e97add 100644
--- a/jsonpointer.py
+++ b/jsonpointer.py
@@ -32,38 +32,22 @@
 
 """ Identify specific nodes in a JSON document (RFC 6901) """
 
-from __future__ import unicode_literals
-
 # Will be parsed by setup.py to determine package metadata
 __author__ = 'Stefan Kögl <stefan@skoegl.net>'
-__version__ = '2.3'
+__version__ = '3.0.0'
 __website__ = 'https://github.com/stefankoegl/python-json-pointer'
 __license__ = 'Modified BSD License'
 
-
-try:
-    from itertools import izip
-    str = unicode
-    encode_str = lambda u: u.encode("raw_unicode_escape")
-except ImportError:  # Python 3
-    izip = zip
-    encode_str = lambda u: u
-
-try:
-    from collections.abc import Mapping, Sequence
-except ImportError:  # Python 3
-    from collections import Mapping, Sequence
-
-from itertools import tee, chain
-import re
 import copy
-
+import re
+from collections.abc import Mapping, Sequence
+from itertools import tee, chain
 
 _nothing = object()
 
 
 def set_pointer(doc, pointer, value, inplace=True):
-    """Resolves pointer against doc and sets the value of the target within doc.
+    """Resolves a pointer against doc and sets the value of the target within doc.
 
     With inplace set to true, doc is modified as long as pointer is not the
     root.
@@ -145,7 +129,7 @@ def pairwise(iterable):
     a, b = tee(iterable)
     for _ in b:
         break
-    return izip(a, b)
+    return zip(a, b)
 
 
 class JsonPointerException(Exception):
@@ -259,12 +243,11 @@ def get_part(cls, doc, part):
         else:
             raise JsonPointerException("Document '%s' does not support indexing, "
                                        "must be mapping/sequence or support __getitem__" % type(doc))
-            
+
     def get_parts(self):
         """Returns the list of the parts. For example, JsonPointer('/a/b').get_parts() == ['a', 'b']"""
-        
-        return self.parts
 
+        return self.parts
 
     def walk(self, doc, part):
         """ Walks one step in doc and returns the referenced part """
@@ -281,7 +264,7 @@ def walk(self, doc, part):
                 return doc[part]
 
             except IndexError:
-                raise JsonPointerException("index '%s' is out of bounds" % (part, ))
+                raise JsonPointerException("index '%s' is out of bounds" % (part,))
 
         # Else the object is a mapping or supports __getitem__(so assume custom indexing)
         try:
@@ -290,7 +273,6 @@ def walk(self, doc, part):
         except KeyError:
             raise JsonPointerException("member '%s' not found in %s" % (part, doc))
 
-
     def contains(self, ptr):
         """ Returns True if self contains the given ptr """
         return self.parts[:len(ptr.parts)] == ptr.parts
@@ -309,12 +291,11 @@ def join(self, suffix):
             suffix_parts = suffix
         try:
             return JsonPointer.from_parts(chain(self.parts, suffix_parts))
-        except:
+        except:  # noqa E722
             raise JsonPointerException("Invalid suffix")
 
-    def __truediv__(self, suffix): # Python 3
+    def __truediv__(self, suffix):  # Python 3
         return self.join(suffix)
-    __div__ = __truediv__ # Python 2
 
     @property
     def path(self):
@@ -342,10 +323,10 @@ def __hash__(self):
         return hash(tuple(self.parts))
 
     def __str__(self):
-        return encode_str(self.path)
+        return self.path
 
     def __repr__(self):
-        return "JsonPointer(" + repr(self.path) + ")"
+        return type(self).__name__ + "(" + repr(self.path) + ")"
 
     @classmethod
     def from_parts(cls, parts):
@@ -362,5 +343,6 @@ def from_parts(cls, parts):
 def escape(s):
     return s.replace('~', '~0').replace('/', '~1')
 
+
 def unescape(s):
     return s.replace('~1', '/').replace('~0', '~')
diff --git a/makefile b/makefile
index e0a2fcf..c40b485 100644
--- a/makefile
+++ b/makefile
@@ -10,7 +10,7 @@ help:
 	@echo
 
 test:
-	python tests.py
+	python -munittest
 
 coverage:
 	coverage run --source=jsonpointer tests.py
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9fcb076..239fcca 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,4 @@
 wheel
-twine>=1.11.0
-setuptools>=38.6.0
+setuptools
+coverage
+flake8
diff --git a/setup.cfg b/setup.cfg
index 2a9acf1..ab8f354 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,6 @@
 [bdist_wheel]
 universal = 1
+
+[flake8]
+max-line-length = 120
+exclude = .git,.tox,dist,doc,*egg,build,.venv
\ No newline at end of file
diff --git a/setup.py b/setup.py
index da27f3f..3e87a4c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,10 @@
 #!/usr/bin/env python
 
-from setuptools import setup
-import re
 import io
 import os.path
+import re
+
+from setuptools import setup
 
 dirname = os.path.dirname(os.path.abspath(__file__))
 filename = os.path.join(dirname, 'jsonpointer.py')
@@ -14,7 +15,7 @@
 PACKAGE = 'jsonpointer'
 
 MODULES = (
-        'jsonpointer',
+    'jsonpointer',
 )
 
 AUTHOR_EMAIL = metadata['author']
@@ -26,10 +27,8 @@
 # Extract name and e-mail ("Firstname Lastname <mail@example.org>")
 AUTHOR, EMAIL = re.match(r'(.*) <(.*)>', AUTHOR_EMAIL).groups()
 
-
 with open('README.md') as readme:
-	long_description = readme.read()
-
+    long_description = readme.read()
 
 CLASSIFIERS = [
     'Development Status :: 5 - Production/Stable',
@@ -38,14 +37,13 @@
     'License :: OSI Approved :: BSD License',
     'Operating System :: OS Independent',
     'Programming Language :: Python',
-    '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',
+    'Programming Language :: Python :: 3.12',
     'Programming Language :: Python :: Implementation :: CPython',
     'Programming Language :: Python :: Implementation :: PyPy',
     'Topic :: Software Development :: Libraries',
@@ -64,5 +62,5 @@
       py_modules=MODULES,
       scripts=['bin/jsonpointer'],
       classifiers=CLASSIFIERS,
-      python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
-)
+      python_requires='>=3.7',
+      )
diff --git a/tests.py b/tests.py
index 9252369..7b1cdac 100755
--- a/tests.py
+++ b/tests.py
@@ -3,19 +3,21 @@
 
 from __future__ import unicode_literals
 
+import copy
 import doctest
-import unittest
 import sys
-import copy
+import unittest
+
+import jsonpointer
 from jsonpointer import resolve_pointer, EndOfList, JsonPointerException, \
-         JsonPointer, set_pointer
+    JsonPointer, set_pointer
 
 
 class SpecificationTests(unittest.TestCase):
     """ Tests all examples from the JSON Pointer specification """
 
     def test_example(self):
-        doc =   {
+        doc = {
             "foo": ["bar", "baz"],
             "": 0,
             "a/b": 1,
@@ -41,7 +43,6 @@ def test_example(self):
         self.assertEqual(resolve_pointer(doc, "/ "), 7)
         self.assertEqual(resolve_pointer(doc, "/m~0n"), 8)
 
-
     def test_eol(self):
         doc = {
             "foo": ["bar", "baz"]
@@ -164,19 +165,16 @@ def test_eq_hash(self):
         self.assertFalse(p1 == "/something/1/b")
 
     def test_contains(self):
-
         self.assertTrue(self.ptr1.contains(self.ptr2))
         self.assertTrue(self.ptr1.contains(self.ptr1))
         self.assertFalse(self.ptr1.contains(self.ptr3))
 
     def test_contains_magic(self):
-
         self.assertTrue(self.ptr2 in self.ptr1)
         self.assertTrue(self.ptr1 in self.ptr1)
         self.assertFalse(self.ptr3 in self.ptr1)
 
     def test_join(self):
-
         ptr12a = self.ptr1.join(self.ptr2)
         self.assertEqual(ptr12a.path, "/a/b/c/a/b")
 
@@ -195,7 +193,6 @@ def test_join(self):
         self.assertRaises(JsonPointerException, self.ptr1.join, 0)
 
     def test_join_magic(self):
-
         ptr12a = self.ptr1 / self.ptr2
         self.assertEqual(ptr12a.path, "/a/b/c/a/b")
 
@@ -211,6 +208,7 @@ def test_join_magic(self):
         ptr12e = self.ptr1 / ["a", "b"]
         self.assertEqual(ptr12e.path, "/a/b/c/a/b")
 
+
 class WrongInputTests(unittest.TestCase):
 
     def test_no_start_slash(self):
@@ -243,7 +241,6 @@ def test_empty_path(self):
         self.assertEqual(doc, last)
         self.assertTrue(nxt is None)
 
-
     def test_path(self):
         doc = {'a': [{'b': 1, 'c': 2}, 5]}
         ptr = JsonPointer('/a/0/b')
@@ -255,7 +252,7 @@ def test_path(self):
 class SetTests(unittest.TestCase):
 
     def test_set(self):
-        doc =   {
+        doc = {
             "foo": ["bar", "baz"],
             "": 0,
             "a/b": 1,
@@ -284,7 +281,7 @@ def test_set(self):
 
         newdoc = set_pointer(doc, "/fud", {}, inplace=False)
         newdoc = set_pointer(newdoc, "/fud/gaw", [1, 2, 3], inplace=False)
-        self.assertEqual(resolve_pointer(newdoc, "/fud"), {'gaw' : [1, 2, 3]})
+        self.assertEqual(resolve_pointer(newdoc, "/fud"), {'gaw': [1, 2, 3]})
 
         newdoc = set_pointer(doc, "", 9, inplace=False)
         self.assertEqual(newdoc, 9)
@@ -306,14 +303,13 @@ def test_set(self):
         self.assertRaises(JsonPointerException, set_pointer, doc, "/fud/gaw", 9)
 
         set_pointer(doc, "/fud", {})
-        set_pointer(doc, "/fud/gaw", [1, 2, 3] )
-        self.assertEqual(resolve_pointer(doc, "/fud"), {'gaw' : [1, 2, 3]})
+        set_pointer(doc, "/fud/gaw", [1, 2, 3])
+        self.assertEqual(resolve_pointer(doc, "/fud"), {'gaw': [1, 2, 3]})
 
         self.assertRaises(JsonPointerException, set_pointer, doc, "", 9)
 
 
 class AltTypesTests(unittest.TestCase):
-
     class Node(object):
         def __init__(self, name, parent=None):
             self.name = name
@@ -348,13 +344,13 @@ def __setitem__(self, key, val):
     class mdict(object):
         def __init__(self, d):
             self._d = d
+
         def __getitem__(self, item):
             return self._d[item]
 
     mdict = mdict({'root': {'1': {'2': '3'}}})
     Node = Node
 
-
     def test_alttypes(self):
         Node = self.Node
 
@@ -410,23 +406,6 @@ def test_mock_dict_raises_key_error(self):
         self.assertRaises(JsonPointerException, resolve_pointer, doc, '/root/1/2/3/4')
 
 
-
-suite = unittest.TestSuite()
-suite.addTest(unittest.makeSuite(SpecificationTests))
-suite.addTest(unittest.makeSuite(ComparisonTests))
-suite.addTest(unittest.makeSuite(WrongInputTests))
-suite.addTest(unittest.makeSuite(ToLastTests))
-suite.addTest(unittest.makeSuite(SetTests))
-suite.addTest(unittest.makeSuite(AltTypesTests))
-
-modules = ['jsonpointer']
-
-for module in modules:
-    m = __import__(module, fromlist=[module])
-    suite.addTest(doctest.DocTestSuite(m))
-
-runner = unittest.TextTestRunner(verbosity=1)
-result = runner.run(suite)
-
-if not result.wasSuccessful():
-    sys.exit(1)
+def load_tests(loader, tests, ignore):
+    tests.addTests(doctest.DocTestSuite(jsonpointer))
+    return tests