diff --git a/MANIFEST.in b/MANIFEST.in
index 64ad321..10dd512 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1,5 @@
-include README.md LICENSE
+include README.md LICENSE tox.ini
+recursive-include docs *
+recursive-exclude docs/_build *
+recursive-include tests *
+exclude **/*.pyc
diff --git a/pyproject.toml b/pyproject.toml
index 374b58c..1f82bc5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,56 @@
-[build-system]
-requires = [
-    "setuptools>=42",
-    "wheel"
+[project]
+name = "python-socketio"
+version = "5.9.1.dev0"
+authors = [
+    { name = "Miguel Grinberg", email = "miguel.grinberg@gmail.com" },
+]
+description = "Socket.IO server and client for Python"
+classifiers = [
+    "Environment :: Web Environment",
+    "Intended Audience :: Developers",
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+]
+requires-python = ">=3.6"
+dependencies = [
+    "bidict >= 0.21.0",
+    "python-engineio >= 4.8.0",
+]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.urls]
+Homepage = "https://github.com/miguelgrinberg/python-socketio"
+"Bug Tracker" = "https://github.com/miguelgrinberg/python-socketio/issues"
+
+[project.optional-dependencies]
+client = [
+    "requests >= 2.21.0",
+    "websocket-client >= 0.54.0",
 ]
+asyncio_client = [
+    "aiohttp >= 3.4",
+]
+docs = [
+    "sphinx",
+]
+
+[tool.setuptools]
+zip-safe = false
+include-package-data = true
+
+[tool.setuptools.package-dir]
+"" = "src"
+
+[tool.setuptools.packages.find]
+where = [
+    "src",
+]
+namespaces = false
+
+[build-system]
+requires = ["setuptools>=61.2"]
 build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index e5e80a6..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,40 +0,0 @@
-[metadata]
-name = python-socketio
-version = 5.9.1.dev0
-author = Miguel Grinberg
-author_email = miguel.grinberg@gmail.com
-description = Socket.IO server and client for Python
-long_description = file: README.md
-long_description_content_type = text/markdown
-url = https://github.com/miguelgrinberg/python-socketio
-project_urls =
-    Bug Tracker = https://github.com/miguelgrinberg/python-socketio/issues
-classifiers =
-    Environment :: Web Environment
-    Intended Audience :: Developers
-    Programming Language :: Python :: 3
-    License :: OSI Approved :: MIT License
-    Operating System :: OS Independent
-
-[options]
-zip_safe = False
-include_package_data = True
-package_dir =
-    = src
-packages = find:
-python_requires = >=3.6
-install_requires =
-    bidict >= 0.21.0
-    python-engineio >= 4.7.0
-
-[options.packages.find]
-where = src
-
-[options.extras_require]
-client =
-    requests >= 2.21.0
-    websocket-client >= 0.54.0
-asyncio_client =
-    aiohttp >= 3.4
-docs =
-    sphinx
diff --git a/setup.py b/setup.py
deleted file mode 100644
index b908cbe..0000000
--- a/setup.py
+++ /dev/null
@@ -1,3 +0,0 @@
-import setuptools
-
-setuptools.setup()