Relicense Betty under the GNU General Public License, Version 3 or later

betty/tests/_package/test_license_compatibility.py

@@ -21,6 +21,7 @@ class TestPackageLicenses:
         "BSD-3-Clause",
         "GPL v3",
         "GNU General Public License v3 (GPLv3)",
+        "GNU General Public License v3 or later (GPLv3+)",
         "GNU Library or Lesser General Public License (LGPL)",
         "GNU Lesser General Public License v2 or later (LGPLv2+)",
         "Historical Permission Notice and Disclaimer (HPND)",
@@ -45,7 +46,7 @@ def assert_is_compatible(self, package_license: dict[str, Any]) -> None:
 
     async def test_runtime_dependency_license_compatibility(self) -> None:
         """
-        Assert that all runtime dependencies have licenses compatible with the GPLv3, so we can legally bundle them.
+        Assert that all runtime dependencies have licenses compatible with the GNU General Public License, Version 3 or later, so we can legally bundle them.
         """
         seen_distribution_names: set[str] = set()
 

documentation/about/license.rst

@@ -7,8 +7,12 @@ Betty is copyright Bart Feenstra and contributors, and released under the **GPL*
 - You may make changes to your copy of Betty
 - You may distribute Betty and your own changes, but you must do so under the exact same license, provide that license, and make your source code available.
 
-GNU General Public License, Version 3
--------------------------------------
+GNU General Public License, Version 3 or later
+----------------------------------------------
+
+Betty is released under the **GNU General Public License, Version 3**, **or any later version** of the
+GNU General Public License.
+
 .. seealso::
     `Read more <https://www.gnu.org/licenses/gpl-3.0.en.html>`_ about the **GNU General Public License, Version 3** (also known as the **GPL**).
 

pyproject.toml

@@ -45,7 +45,7 @@ classifiers = [
     'Intended Audience :: Developers',
     'Intended Audience :: End Users/Desktop',
     'Intended Audience :: Science/Research',
-    'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
+    'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
     'Programming Language :: JavaScript',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',