--- pyproject.toml.orig	2026-07-02 15:34:40 UTC
+++ pyproject.toml
@@ -1,6 +1,6 @@ requires = [
 [build-system]
 requires = [
-    "setuptools>=78",
+    "setuptools>=61",
     "setuptools_scm>=8",
     "numpy>=1.7"
 ]
@@ -13,8 +13,7 @@ dynamic = ["version"]
 ]
 description = "A full featured python library to read from and write to FITS files."
 dynamic = ["version"]
-license = "GPL-2.0-or-later"
-license-files = ["LICENSE.txt"]
+license = {text = "GPL-2.0-or-later"}
 readme = "README.md"
 classifiers = [
     "Development Status :: 5 - Production/Stable",