diff --git a/CHANGES.rst b/CHANGES.rst
index 23c8410a..3ac214ab 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,8 @@
+Upcoming
+========
+    * The ``setup.cfg`` packaging configuration has been replaced by
+      ``pyproject.toml``. (+527)
+
 v3.3.0
 ======
     * The unpickler was updated to avoid using ``eval``, which helps improve its
diff --git a/pyproject.toml b/pyproject.toml
index 8e907569..572944ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,82 @@
 [build-system]
-requires = ["setuptools>=56", "setuptools_scm[toml]>=3.4.1"]
+requires = ["setuptools>=61.2", "setuptools_scm[toml]>=6.0"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "jsonpickle"
+authors = [
+    { name = "Theelx" },
+    { name = "David Aguilar", email = "davvid+jsonpickle@gmail.com" },
+]
+description = "jsonpickle encodes/decodes any Python object to/from JSON"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: BSD License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+]
+requires-python = ">=3.7"
+dependencies = [
+]
+dynamic = ["version"]
+
+[project.readme]
+file = "README.rst"
+content-type = "text/x-rst"
+
+[project.urls]
+Documentation = "https://jsonpickle.readthedocs.io/"
+Homepage = "https://jsonpickle.readthedocs.io/"
+Source = "https://github.com/jsonpickle/jsonpickle"
+
+[project.optional-dependencies]
+dev = [
+    "black",
+]
+testing = [
+    # core
+    "pytest >= 6.0, != 8.1.*",
+    "pytest-benchmark",
+    "pytest-benchmark[histogram]",
+    "pytest-checkdocs >= 1.2.3",
+    "pytest-enabler >= 1.0.1",
+    "pytest-ruff >= 0.2.1",
+    # local
+    "bson",
+    "ecdsa",
+    "feedparser",
+    "gmpy2",
+    "numpy",
+    "pandas",
+    "pymongo",
+    "scikit-learn",
+    "scipy>=1.9.3; python_version > '3.10'",
+    "scipy; python_version <= '3.10'",
+    "simplejson",
+    "sqlalchemy",
+    "ujson",
+]
+docs = [
+    "furo",
+    "rst.linker >= 1.9",
+    "sphinx >= 3.5",
+]
+packaging = [
+    "build",
+    "setuptools>=61.2",
+    "setuptools_scm[toml]>=6.0",
+    "twine",
+]
+
+[tool.setuptools]
+packages = [
+    "jsonpickle",
+    "jsonpickle.ext",
+]
+include-package-data = true
+license-files = ["LICENSE"]
+
 [tool.black]
 skip-string-normalization = true
 
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index e9530a02..00000000
--- a/setup.cfg
+++ /dev/null
@@ -1,80 +0,0 @@
-[metadata]
-license_files = LICENSE
-name = jsonpickle
-author = David Aguilar
-author_email = davvid@gmail.com
-description = Python library for serializing arbitrary object graphs into JSON
-long_description = file:README.rst
-url = https://github.com/jsonpickle/jsonpickle
-classifiers =
-	Development Status :: 5 - Production/Stable
-	Intended Audience :: Developers
-	License :: OSI Approved :: BSD License
-	Programming Language :: Python
-	Programming Language :: Python :: 3
-	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 :: 3.13
-	Programming Language :: JavaScript
-	Operating System :: OS Independent
-	Topic :: Software Development :: Libraries :: Python Modules
-platforms =
-	POSIX
-	Windows
-keywords =
-	json pickle
-	json
-	pickle
-	marshal
-	serialization
-	JavaScript Object Notation
-
-[options]
-packages = find:
-include_package_data = true
-python_requires = >=3.7
-install_requires =
-	importlib_metadata; python_version<"3.8"
-setup_requires = setuptools_scm[toml] >= 3.4.1
-
-[options.extras_require]
-testing =
-	# upstream
-	pytest >= 3.5, !=3.7.3
-	pytest-checkdocs >= 1.2.3
-	pytest-cov
-	pytest-enabler >= 1.0.1
-	pytest-ruff >= 0.2.1
-
-	# local
-	bson
-	ecdsa
-	feedparser
-	gmpy2
-	numpy
-	pandas
-	pymongo
-	pytest-benchmark
-	pytest-benchmark[histogram]
-	scikit-learn
-	scipy>=1.9.3; python_version>"3.10"
-	scipy; python_version<="3.10"
-	simplejson
-	sqlalchemy
-	ujson
-
-docs =
-	# upstream
-	sphinx
-	rst.linker >= 1.9
-	furo
-
-	# local
-
-packaging =
-	build
-	twine