diff --git a/CHANGES b/CHANGES
index ae5df99..3794d42 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5,6 +5,7 @@ Injector Change Log
 ------
 
 - Dropped support for Python 3.8 and 3.9. Python 3.10+ is now required.
+- Use the SPDX license identifier `BSD-3-Clause` in package metadata.
 
 0.24.0
 ------
diff --git a/injector/__init__.py b/injector/__init__.py
index 55f7ab2..402c47c 100644
--- a/injector/__init__.py
+++ b/injector/__init__.py
@@ -11,7 +11,7 @@
 """Injector - Python dependency injection framework, inspired by Guice
 
 :copyright: (c) 2012 by Alec Thomas
-:license: BSD
+:license: BSD-3-Clause
 """
 
 import functools
diff --git a/pyproject.toml b/pyproject.toml
index a865d61..a3166fa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,7 @@
+[build-system]
+requires = ["setuptools>=77"]
+build-backend = "setuptools.build_meta"
+
 [tool.black]
 line-length = 110
 target_version = ['py310']
diff --git a/setup.py b/setup.py
index 558ae56..ad91e90 100644
--- a/setup.py
+++ b/setup.py
@@ -62,7 +62,8 @@ def read_injector_variable(name):
     description=description,
     long_description=long_description,
     long_description_content_type='text/markdown',
-    license='BSD',
+    license_expression='BSD-3-Clause',
+    license_files=['COPYING'],
     platforms=['any'],
     packages=['injector'],
     package_data={'injector': ['py.typed']},