diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c947e8..8ea5107 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,20 @@ Version numbers follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html
 
 ---
 
+## [0.1.7] — 2026-08-12
+
+### Changed
+- `pyproject.toml`: `license` is now the canonical SPDX expression
+  `GPL-3.0-only` instead of the deprecated `GPL-3.0` identifier. The license
+  itself is unchanged — only its machine-readable spelling.
+- `pyproject.toml`: the build requirement is now `setuptools>=77`, the first
+  release implementing PEP 639 (a string `license` holding an SPDX expression,
+  plus `license-files`). The previous `setuptools>=68` allowed versions that
+  reject a string `license` value, so a build in a clean environment could
+  resolve a setuptools too old to understand this metadata.
+
+---
+
 ## [0.1.6] — 2026-07-08
 
 ### Fixed
@@ -135,7 +149,8 @@ Version numbers follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html
 
 ---
 
-[Unreleased]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.6...HEAD
+[Unreleased]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.7...HEAD
+[0.1.7]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.6...v0.1.7
 [0.1.6]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.5...v0.1.6
 [0.1.5]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.4...v0.1.5
 [0.1.4]: https://github.com/NC3-TestingPlatform/chainvalidator/compare/v0.1.3...v0.1.4
diff --git a/chainvalidator/__init__.py b/chainvalidator/__init__.py
index 369fad1..d1a38e3 100644
--- a/chainvalidator/__init__.py
+++ b/chainvalidator/__init__.py
@@ -21,7 +21,7 @@
 try:
     __version__ = version("chainvalidator")
 except PackageNotFoundError:  # pragma: no cover
-    __version__ = "0.1.6"
+    __version__ = "0.1.7"
 
 # NullHandler so library users who have not configured logging
 # do not see "No handler found" warnings (PEP 3118 / logging HOWTO).
diff --git a/pyproject.toml b/pyproject.toml
index ebe9e7f..30332ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,14 +1,14 @@
 [build-system]
-requires = ["setuptools>=68", "wheel"]
+requires = ["setuptools>=77", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "chainvalidator"
-version = "0.1.6"
+version = "0.1.7"
 description = "DNSSEC chain-of-trust validator – CLI utility and Python library"
 readme = "README.md"
 requires-python = ">=3.11"
-license = "GPL-3.0"
+license = "GPL-3.0-only"
 license-files = ["LICENSE"]
 authors = [{ name = "t0kubetsu" }]
 keywords = [