diff --git a/pyproject.toml b/pyproject.toml
index 32fb0dd..a787384 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=38.3.0", "wheel"]
+requires = ["setuptools>=64.0.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -75,6 +75,23 @@ extend-exclude = '''
 )/
 '''
 
+# coverage configuration
+[tool.coverage.run]
+branch = true
+relative_files = true
+parallel = true
+source = [
+    "tests",
+    "wrapt",
+]
+
+[tool.coverage.paths]
+src = [
+    "src/",
+    ".tox/*/lib/*/site-packages/",
+    ".tox/pypy*/site-packages/",
+]
+
 # pytest configuration
 [tool.pytest.ini_options]
 testpaths = ["tests"]
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 62ec0f8..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,96 +0,0 @@
-# --- Project configuration -------------------------------------------------
-
-[metadata]
-name = wrapt
-version = attr: wrapt.__version__
-readme = "RELEASE.rst"
-author = Graham Dumpleton
-author_email = Graham.Dumpleton@gmail.com
-url = https://github.com/GrahamDumpleton/wrapt
-description = Module for decorators, wrappers and monkey patching.
-long_description = file: RELEASE.rst
-long_description_content_type = text/x-rst
-platform = any
-keywords = wrapper, proxy, decorator
-classifiers =
-    Development Status :: 5 - Production/Stable
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Programming Language :: Python :: 3.12
-    Programming Language :: Python :: 3.13
-    Programming Language :: Python :: 3.14
-    Programming Language :: Python :: Implementation :: CPython
-    Programming Language :: Python :: Implementation :: PyPy
-project_urls =
-    Bug Tracker = https://github.com/GrahamDumpleton/wrapt/issues/
-    Changelog = https://wrapt.readthedocs.io/en/latest/changes.html
-    Documentation = https://wrapt.readthedocs.io/
-
-[options]
-zip_safe = false
-python_requires = >= 3.9
-packages = find:
-package_dir =
-    =src
-test_suite = tests
-
-[options.packages.find]
-where=src
-
-[bdist_wheel]
-universal = false
-
-# --- Test and coverage configuration ------------------------------------------
-
-[coverage:run]
-branch = true
-relative_files = true
-parallel = true
-source =
-    tests
-    wrapt
-
-[coverage:paths]
-src =
-    src/
-    .tox/*/lib/*/site-packages/
-    .tox/pypy*/site-packages/
-
-[tool:pytest]
-testpaths = ["tests"]
-addopts = ["-v"]
-norecursedirs = [".tox", ".venv", "venv", "build", "dist"]
-
-# --- Tox automation configuration ---------------------------------------------
-
-[tox:tox]
-envlist =
-  py{39,310,311,312,313,314}
-  py{39,310,311,312,313,314}-{without,install,disable}-extensions,
-  pypy-without-extensions
-
-[gh-actions]
-python =
-    3.9: py39, py39-without-extensions, py39-install-extensions, py39-disable-extensions
-    3.10: py310, py310-without-extensions, py310-install-extensions, py310-disable-extensions
-    3.11: py311, py311-without-extensions, py311-install-extensions, py311-disable-extensions
-    3.12: py312, py312-without-extensions, py312-install-extensions, py312-disable-extensions
-    3.13: py313, py313-without-extensions, py313-install-extensions, py313-disable-extensions
-    3.14: py314, py314-without-extensions, py314-install-extensions, py314-disable-extensions
-    pypy-3.9: pypy-without-extensions
-    pypy-3.10: pypy-without-extensions
-
-[testenv]
-deps =
-  coverage
-  pytest
-install_command =
-  python -m pip install --no-binary coverage {opts} {packages}
-commands =
-  python -m coverage run --rcfile {toxinidir}/setup.cfg -m pytest -v {posargs} {toxinidir}/tests
-setenv =
-  without-extensions: WRAPT_INSTALL_EXTENSIONS = false
-  install-extensions,disable-extensions: WRAPT_INSTALL_EXTENSIONS = true
-  disable-extensions: WRAPT_DISABLE_EXTENSIONS = true
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..33df451
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,28 @@
+[tox]
+envlist =
+  py{39,310,311,312,313,314}
+  py{39,310,311,312,313,314}-{without,install,disable}-extensions,
+  pypy-without-extensions
+
+[testenv]
+deps =
+  coverage
+  pytest
+install_command = python -m pip install --no-binary coverage {opts} {packages}
+setenv =
+  without-extensions: WRAPT_INSTALL_EXTENSIONS = false
+  install-extensions,disable-extensions: WRAPT_INSTALL_EXTENSIONS = true
+  disable-extensions: WRAPT_DISABLE_EXTENSIONS = true
+commands =
+  python -m coverage run --rcfile {toxinidir}/pyproject.toml -m pytest -v {posargs} {toxinidir}/tests
+
+[gh-actions]
+python =
+    3.9: py39, py39-without-extensions, py39-install-extensions, py39-disable-extensions
+    3.10: py310, py310-without-extensions, py310-install-extensions, py310-disable-extensions
+    3.11: py311, py311-without-extensions, py311-install-extensions, py311-disable-extensions
+    3.12: py312, py312-without-extensions, py312-install-extensions, py312-disable-extensions
+    3.13: py313, py313-without-extensions, py313-install-extensions, py313-disable-extensions
+    3.14: py314, py314-without-extensions, py314-install-extensions, py314-disable-extensions
+    pypy-3.9: pypy-without-extensions
+    pypy-3.10: pypy-without-extensions