diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..58423b9
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+    # manually triggered
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+    env:
+      UV_PYTHON: ${{ matrix.python-version }}
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@main
+      - name: Install the default version of uv
+        id: setup-uv
+        uses: astral-sh/setup-uv@v3
+      - name: Print the installed version
+        run: echo "Installed uv version is ${{ steps.setup-uv.outputs.uv-version }}"
+      - name: Install Python ${{ matrix.python-version }}
+        run: uv python install  ${{ matrix.python-version }}
+
+      - name: Tests
+        run: |
+          uv venv
+          uv pip install ".[testing]"
+          uv run ruff format . --check
+          uv run ruff check .
+          .venv/bin/pytest -x tests --cov=confetti --cov-report=html
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 9f71c79..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-language: python
-sudo: false
-python:
-- 2.7
-- 3.5
-- 3.6
-install:
-- pip install -e .
-script: pytest tests
-deploy:
-  provider: pypi
-  user: vmalloc
-  password:
-    secure: LB2D3QUQYomZ7yIwtTQSikuDNFrBLU9RFQ/9bwXxBiMBeMyrT4rpL5XOon8z0LvrsHlzmEAezf25qXmAqUO0LpsbhVXqAEcGfFrxGjOFZxl1eIj3HjK/8pBgR0VRiNYB/zbe/ll//4dy30qMqvRQJPnLKGOz3MkDbdZrdJDDKic=
-  on:
-    tags: true
-    repo: getslash/confetti
-    python: '3.6'
diff --git a/Makefile b/Makefile
index 24a4b17..ec27fff 100644
--- a/Makefile
+++ b/Makefile
@@ -4,21 +4,12 @@ detox-test:
 	detox
 
 test: env
-	.env/bin/py.test tests
+	.venv/bin/pytest -x tests --cov=confetti --cov-report=html
 
-coverage-test: env
-	.env/bin/coverage run .env/bin/py.test -w tests
-
-env: .env/.up-to-date
-
-.env/.up-to-date: setup.py Makefile
-	virtualenv .env
-	.env/bin/pip install -e .
-	.env/bin/pip install Sphinx==1.1.3 releases pytest
-	touch .env/.up-to-date
+env:
+	uv venv
+	uv pip install -e ".[testing]"
 
 doc: env
-	.env/bin/python setup.py build_sphinx
-
-.PHONY: doc
+	.venv/bin/sphinx-build -a -W -E doc build/sphinx/html
 
diff --git a/confetti/__version__.py b/confetti/__version__.py
index 43b48b6..a9686e0 100644
--- a/confetti/__version__.py
+++ b/confetti/__version__.py
@@ -1 +1,3 @@
-__version__ = "2.5.3"
+from importlib.metadata import distribution
+
+__version__ = distribution("confetti").version
diff --git a/confetti/config.py b/confetti/config.py
index c7966fc..b7d9d8d 100644
--- a/confetti/config.py
+++ b/confetti/config.py
@@ -5,7 +5,6 @@
 from sentinels import NOTHING
 
 from . import exceptions
-from .python3_compat import iteritems, string_types, itervalues
 from .ref import Ref
 from .utils import coerce_leaf_value
 
@@ -45,7 +44,7 @@ def mark_clean(self):
         while stack:
             root = stack.pop()
             if isinstance(root, dict):
-                stack.extend(itervalues(root))
+                stack.extend(iter(root.values()))
             elif isinstance(root, Config):
                 stack.extend(root.itervalues())
 
@@ -64,7 +63,7 @@ def _init_value(self, value):
 
     def _fix_dictionary_value(self):
         to_replace = []
-        for k, v in iteritems(self._value):
+        for k, v in self._value.items():
             if isinstance(v, dict):
                 to_replace.append((k, Config(v, parent=self)))
         for k, v in to_replace:
@@ -199,10 +198,10 @@ def extend(self, conf=None, **kw):
 
     def _extend_from_conf(self, conf):
         conf = dict((key, conf.get_config(key)) for key in conf.keys())
-        for key, value in iteritems(conf):
+        for key, value in conf.items():
             if key in self._value:
                 self.get_config(key)._verify_config_paths(value)
-        for key, value in iteritems(conf):
+        for key, value in conf.items():
             self._value[key] = value
 
     def _verify_config_paths(self, conf):
@@ -233,7 +232,7 @@ def _verify_config_paths(self, conf):
                     self.get_config(k)._verify_config_paths(conf._value[k])
 
     def _extend_from_dict(self, d):
-        for key, value in iteritems(d):
+        for key, value in d.items():
             if isinstance(value, dict):
                 if key not in self._value:
                     self._value[key] = {}
@@ -243,7 +242,7 @@ def _extend_from_dict(self, d):
 
     def update(self, conf):
         conf = dict((key, conf.get_config(key)) for key in conf.keys())
-        for key, value in iteritems(conf):
+        for key, value in conf.items():
             if not value.is_leaf():
                 if key not in self._value:
                     self._value[key] = {}
@@ -258,7 +257,7 @@ def keys(self):
         return self._value.keys()
 
     def itervalues(self):
-        return itervalues(self._value)
+        return iter(self._value.values())
 
     @classmethod
     def from_filename(cls, filename, namespace=None):
@@ -350,7 +349,7 @@ def assign_path(self, path, value, deduce_type=False, default_type=None):
         3
         """
         config = self.get_config(path)
-        if deduce_type and isinstance(value, string_types):
+        if deduce_type and isinstance(value, str):
             leaf = self.get_path(path)
             value = coerce_leaf_value(path, value, leaf, default_type)
 
@@ -375,7 +374,6 @@ def __repr__(self):
 
 
 class ConfigProxy(object):
-
     def __init__(self, conf):
         super(ConfigProxy, self).__init__()
         self._conf = conf
@@ -427,7 +425,7 @@ def _set_state(config, state):
     assert isinstance(config, Config)
     for key in set(config.keys()) - set(state):
         config.pop(key)
-    for key, value in iteritems(state):
+    for key, value in state.items():
         if isinstance(value, dict):
             _set_state(config[key], value)
         else:
diff --git a/confetti/metadata.py b/confetti/metadata.py
index db78204..f2b01ed 100644
--- a/confetti/metadata.py
+++ b/confetti/metadata.py
@@ -2,7 +2,6 @@
 
 
 class Metadata(object):
-
     def __init__(self, **kwargs):
         super(Metadata, self).__init__()
         self.metadata = kwargs
diff --git a/confetti/python3_compat.py b/confetti/python3_compat.py
deleted file mode 100644
index c167447..0000000
--- a/confetti/python3_compat.py
+++ /dev/null
@@ -1,27 +0,0 @@
-import platform
-from types import MethodType
-
-IS_PY3 = platform.python_version() >= "3"
-
-if IS_PY3:
-    iteritems = lambda d: iter(d.items())  # not dict.items!!! See above
-    itervalues = lambda d: iter(d.values())
-
-    create_instance_method = MethodType
-    basestring = str
-    string_types = (basestring,)
-    from functools import reduce
-else:
-    iteritems = (
-        lambda d: d.iteritems()
-    )  # not dict.iteritems!!! we support ordered dicts as well
-    itervalues = lambda d: d.itervalues()
-
-    from __builtin__ import basestring
-
-    string_types = (str,)
-    from __builtin__ import reduce
-
-
-def items_list(dictionary):
-    return list(iteritems(dictionary))
diff --git a/confetti/ref.py b/confetti/ref.py
index 98dbccc..c708ac3 100644
--- a/confetti/ref.py
+++ b/confetti/ref.py
@@ -2,7 +2,6 @@
 
 
 class Ref(object):
-
     def __init__(self, target, filter=None):
         super(Ref, self).__init__()
         self._target = target
diff --git a/doc/conf.py b/doc/conf.py
index dd0eb4e..7441d6c 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -11,7 +11,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+# import sys, os
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..00d0786
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,37 @@
+[build-system]
+requires = ["hatchling>=0.25.1", "hatch-vcs"]
+build-backend = "hatchling.build"
+
+[project]
+name = "confetti"
+description = "Generic configuration mechanism"
+readme = "README.rst"
+requires-python = ">=3.8"
+license = { text = "BSD 3-Clause License" }
+
+classifiers = [
+    "Intended Audience :: Developers",
+    "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 :: 3.12",
+    "Programming Language :: Python :: 3.13",
+]
+dependencies = ["sentinels>=0.0.5"]
+dynamic = ["version"]
+
+authors = [{ name = "Rotem Yaari", email = "vmalloc@gmail.com" }]
+
+[project.urls]
+"Homepage" = "https://github.com/getslash/confetti"
+
+[project.optional-dependencies]
+testing = ["pytest", "pytest-cov", "ruff"]
+
+[tool.hatch.version]
+source = "vcs"
+
+[tool.ruff.lint.per-file-ignores]
+"__init__.py" = ["F401"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 6bf1516..0000000
--- a/setup.py
+++ /dev/null
@@ -1,35 +0,0 @@
-import os
-import platform
-import itertools
-from setuptools import setup, find_packages
-
-with open(
-    os.path.join(os.path.dirname(__file__), "confetti", "__version__.py")
-) as version_file:
-    exec(version_file.read())
-
-_REQUIREMENTS = ["sentinels>=0.0.5", "six"]
-if platform.python_version() < "2.7":
-    _REQUIREMENTS.append("unittest2")
-
-setup(
-    name="confetti",
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: BSD License",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-    ],
-    description="Generic configuration mechanism",
-    license="BSD",
-    author="Rotem Yaari",
-    author_email="vmalloc@gmail.com",
-    url="https://github.com/vmalloc/confetti",
-    version=__version__,
-    packages=find_packages(exclude=["tests"]),
-    install_requires=_REQUIREMENTS,
-    scripts=[],
-)
diff --git a/tests/conftest.py b/tests/conftest.py
index 91c7d17..64f8f0c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -32,7 +32,6 @@ def checkpoint():
 
 
 class Checkpoint(object):
-
     called = False
     args = kwargs = timestamp = None
 
diff --git a/tests/test_config.py b/tests/test_config.py
index 521b8c4..0490df5 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -1,7 +1,7 @@
 import os
 import tempfile
 
-from .test_utils import TestCase
+from unittest import TestCase
 from confetti import Config
 from confetti import get_config_object_from_proxy
 from confetti import exceptions
@@ -10,7 +10,6 @@
 
 
 class BasicUsageTest(TestCase):
-
     def setUp(self):
         super(BasicUsageTest, self).setUp()
         self.conf = Config(dict(a=dict(b=2)))
@@ -84,7 +83,6 @@ def test_keys(self):
 
 
 class ExtendingTest(TestCase):
-
     def setUp(self):
         super(ExtendingTest, self).setUp()
         self.conf = Config({"a": 1})
@@ -151,7 +149,6 @@ def test_update_config_preserves_nodes(self):
 
 
 class HelperMethodsTest(TestCase):
-
     def setUp(self):
         super(HelperMethodsTest, self).setUp()
         self.config = Config(
@@ -175,7 +172,6 @@ def test_traverse_leaves(self):
 
 
 class CopyingTest(TestCase):
-
     def test_copying_nested_dictionaries(self):
         raw_conf = {"a": {"b": 2}}
         conf1 = Config(raw_conf)
@@ -185,7 +181,6 @@ def test_copying_nested_dictionaries(self):
 
 
 class LinkedConfigurationTest(TestCase):
-
     def setUp(self):
         super(LinkedConfigurationTest, self).setUp()
         self.conf1 = Config(dict(a=1))
@@ -217,7 +212,6 @@ def test_linked_backups_restore_parent_then_child(self):
 
 
 class BackupTest(TestCase):
-
     def setUp(self):
         super(BackupTest, self).setUp()
         self.conf = Config(dict(a=1, b=2, c=[]))
@@ -250,7 +244,6 @@ def test_backup_copy(self):
 
 
 class SerializationTest(TestCase):
-
     def setUp(self):
         super(SerializationTest, self).setUp()
         self.dict = dict(a=dict(b=dict(c=8)))
diff --git a/tests/test_cross_references.py b/tests/test_cross_references.py
index 558e0b2..92a91ed 100644
--- a/tests/test_cross_references.py
+++ b/tests/test_cross_references.py
@@ -1,4 +1,4 @@
-from .test_utils import TestCase
+from unittest import TestCase
 from confetti import Config, Ref
 
 
diff --git a/tests/test_documentation.py b/tests/test_documentation.py
index 138b967..93920f6 100644
--- a/tests/test_documentation.py
+++ b/tests/test_documentation.py
@@ -4,7 +4,6 @@
 
 
 class DocumentationTest(TestCase):
-
     def test_doctests(self):
         for p, _, filenames in os.walk(
             os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "doc"))
diff --git a/tests/test_path_assignments.py b/tests/test_path_assignments.py
index c9dc5a8..425d666 100644
--- a/tests/test_path_assignments.py
+++ b/tests/test_path_assignments.py
@@ -1,10 +1,9 @@
-from .test_utils import TestCase
+from unittest import TestCase
 from confetti import Config
 from confetti import exceptions
 
 
 class PathAssignmentTest(TestCase):
-
     def setUp(self):
         super(PathAssignmentTest, self).setUp()
         self.conf = Config(dict(a=dict(b=dict(c=3)), d=4, e=None))
diff --git a/tests/test_utils.py b/tests/test_utils.py
deleted file mode 100644
index 2558595..0000000
--- a/tests/test_utils.py
+++ /dev/null
@@ -1,6 +0,0 @@
-import platform
-
-if platform.python_version() < "2.7":
-    from unittest2 import TestCase
-else:
-    from unittest import TestCase
diff --git a/tox.ini b/tox.ini
index 5131fea..1c9e698 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,10 +1,6 @@
 [tox]
-envlist = py26,py27,py33,py34,py35,pypy
+envlist = pypy,py38,py39,py310,py311,py312,py313
 
 [testenv]
 deps=pytest
-commands=py.test tests
-
-[testenv:py26]
-deps=unittest2
-     pytest
+commands=pytest tests