diff --git a/MANIFEST.in b/MANIFEST.in
index 64ad321..e90c5e9 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1,5 @@
-include README.md LICENSE
+include README.md LICENSE tox.ini test_socketio.py
+recursive-include docs *
+recursive-exclude docs/_build *
+recursive-include tests *
+exclude **/*.pyc
diff --git a/pyproject.toml b/pyproject.toml
index 374b58c..f289cb6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,51 @@
+[project]
+name = "Flask-SocketIO"
+version = "5.3.7.dev0"
+authors = [
+    { name = "Miguel Grinberg", email = "miguel.grinberg@gmail.com" },
+]
+description = "Socket.IO integration for Flask applications"
+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 = [
+    "Flask >= 0.9",
+    "python-socketio >= 5.0.2",
+]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.urls]
+Homepage = "https://github.com/miguelgrinberg/flask-socketio"
+"Bug Tracker" = "https://github.com/miguelgrinberg/flask-socketio/issues"
+
+[project.optional-dependencies]
+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>=42",
-    "wheel"
+    "setuptools>=61.2",
 ]
 build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index a28e562..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,35 +0,0 @@
-[metadata]
-name = Flask-SocketIO
-version = 5.3.7.dev0
-author = Miguel Grinberg
-author_email = miguel.grinberg@gmail.com
-description = Socket.IO integration for Flask applications
-long_description = file: README.md
-long_description_content_type = text/markdown
-url = https://github.com/miguelgrinberg/flask-socketio
-project_urls =
-    Bug Tracker = https://github.com/miguelgrinberg/flask-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 =
-    Flask >= 0.9
-    python-socketio >= 5.0.2
-
-[options.packages.find]
-where = src
-
-[options.extras_require]
-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()