diff -upNr c/pyproject.toml a/pyproject.toml
--- c/pyproject.toml	2022-11-30 15:32:54.073303454 +0800
+++ a/pyproject.toml	2022-11-30 15:46:28.976245471 +0800
@@ -8,7 +8,7 @@ build-backend = "hatchling.build"
 name = "soupsieve"
 description = "A modern CSS selector implementation for Beautiful Soup."
 readme = "README.md"
-license = "MIT"
+license = {text = "MIT"}
 requires-python = ">=3.6"
 authors = [
     { name = "Isaac Muse", email = "Isaac.Muse@gmail.com" },
diff -upNr c/setup.py a/setup.py
--- c/setup.py	1970-01-01 08:00:00.000000000 +0800
+++ a/setup.py	2022-11-30 15:55:30.712206925 +0800
@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+
+
+from setuptools import setup
+import os
+
+
+def get_version():
+    """Get version and version_info without importing the entire module."""
+
+    import importlib.util
+
+    path = os.path.join(os.path.dirname(__file__), 'soupsieve', '__meta__.py')
+    spec = importlib.util.spec_from_file_location("__meta__", path)
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    vi = module.__version_info__
+    return vi._get_canonical(), vi._get_dev_status()
+
+def get_requirements(req):
+    """Load list of dependencies."""
+
+    install_requires = []
+    with open(req) as f:
+        for line in f:
+            if not line.startswith("#"):
+                install_requires.append(line.strip())
+    return install_requires
+VER, DEVSTATUS = get_version()
+
+if __name__ == "__main__":
+    setup(
+        name = "soupsieve",
+        version = VER,
+        install_requires=get_requirements("requirements/project.txt"),
+        classifiers=[
+            'Development Status :: %s' % DEVSTATUS,
+            'Environment :: Console',
+            'Intended Audience :: Developers',
+            'License :: OSI Approved :: MIT License',
+            'Operating System :: OS Independent',
+            'Programming Language :: Python :: 3',
+            'Programming Language :: Python :: 3.6',
+            'Programming Language :: Python :: 3.7',
+            'Programming Language :: Python :: 3.8',
+            'Programming Language :: Python :: 3.9',
+            'Programming Language :: Python :: 3.10',
+            'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
+            'Topic :: Software Development :: Libraries :: Python Modules',
+            'Typing :: Typed'
+        ]
+            )