--- pyproject.toml.orig	2026-09-15 16:20:56 UTC
+++ pyproject.toml
@@ -4,8 +4,7 @@ readme = { file = 'README.md', content-type = 'text/ma
 urls.Homepage = 'https://github.com/PyYoshi/cChardet'
 description = 'cChardet is high speed universal character encoding detector.'
 readme = { file = 'README.md', content-type = 'text/markdown' }
-license = "MPL-1.1 OR GPL-2.0-or-later OR LGPL-2.1-or-later"
-license-files = ["COPYING"]
+license = { text = "MPL-1.1 OR GPL-2.0-or-later OR LGPL-2.1-or-later" }
 classifiers = [
     'Programming Language :: Cython',
     'Programming Language :: Python',
@@ -20,7 +19,7 @@ dynamic = ["version"]
 dynamic = ["version"]
 
 [build-system]
-requires = ["setuptools>=77", "Cython>=3.2.9,<3.4"]
+requires = ["setuptools>=61", "Cython>=3.2.9,<3.4"]
 build-backend = "setuptools.build_meta"
 
 [project.scripts]