diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index 7aa60c6..9011664 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -36,9 +36,13 @@ jobs:
     strategy:
       matrix:
         python-version:
+          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
+          - "3.14"
+          - "3.15"
 
     steps:
       - uses: actions/checkout@v5
@@ -51,6 +55,9 @@ jobs:
       - name: Set up Python
         run: uv python install
 
+      - name: Check Python version in uv
+        run: uv run python --version
+
       - name: Install dependencies
         run: uv sync
 
diff --git a/pyproject.toml b/pyproject.toml
index cd73f49..3acdc8f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,40 +1,46 @@
 [build-system]
-requires = ["setuptools>=61.0"]
+requires = ["setuptools>=77.0.3"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "openpaygo"
 version = "0.6.0"
 description = "OpenPAYGO Python library"
-readme = { file = "README.md", content-type = "text/markdown" }
-requires-python = ">=3.6"
-license = { text = "MIT License" }
-keywords = ["paygo"]
+readme = "README.md"
+license = "MIT"
+license-files = ["LICEN[CS]E*"]
 
 authors = [
-  { name = "EnAccess" }
+  { name = "EnAccess", email = "info@enaccess.org" }
+]
+
+keywords = [
+  "paygo",
+  "open-paygo"
 ]
 
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",
-  "License :: OSI Approved :: Apache Software License",
   "Operating System :: Unix",
   "Operating System :: POSIX",
   "Operating System :: MacOS",
   "Operating System :: Microsoft :: Windows",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.7",
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Utilities",
 ]
 
+requires-python = ">=3.9"
+
 dependencies = [
   "siphash>=0.0.1",
 ]
@@ -45,11 +51,12 @@ dev = [
 ]
 
 [project.urls]
-Homepage = "https://enaccess.github.io/OpenPAYGO-docs/"
-Documentation = "https://enaccess.github.io/OpenPAYGO-docs/"
-Changes = "https://github.com/EnAccess/OpenPAYGO-python/releases"
-Source = "https://github.com/EnAccess/OpenPAYGO-python/"
-Issues = "https://github.com/EnAccess/OpenPAYGO-python/issues"
+homepage = "https://enaccess.github.io/OpenPAYGO-docs/"
+source = "https://github.com/EnAccess/OpenPAYGO-python/"
+changelog = "https://github.com/EnAccess/OpenPAYGO-python/releases"
+releasenotes = "https://github.com/EnAccess/OpenPAYGO-python/releases"
+documentation = "https://enaccess.github.io/OpenPAYGO-docs/"
+issues = "https://github.com/EnAccess/OpenPAYGO-python/issues"
 
 [tool.setuptools]
 include-package-data = true