diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 551c101..0620bc4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,11 +32,11 @@ jobs:
       matrix:
         include:
             - os: ubuntu-22.04
-              python-version: '3.9'
-              toxenv: py39
+              python-version: '3.10'
+              toxenv: py310
             - os: ubuntu-24.04
-              python-version: '3.13'
-              toxenv: py313
+              python-version: '3.14'
+              toxenv: py314
 
     env:
       TOXENV: ${{ matrix.toxenv }}
diff --git a/CHANGES.rst b/CHANGES.rst
index 787d554..b568b11 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,15 @@
 Changelog
 =========
 
+Version 0.1.1 (not released yet)
+--------------------------------
+
+- cythonize with latest Cython release
+- use SPDX license identifier, require a recent setuptools
+- add support for Python 3.14, remove 3.9
+- migrate tox configuration to pyproject.toml
+- fix typos and grammar
+
 Version 0.1.0 2024-11-18
 ------------------------
 
diff --git a/LICENSE.rst b/LICENSE.rst
index 51c0191..06568d1 100644
--- a/LICENSE.rst
+++ b/LICENSE.rst
@@ -1,4 +1,4 @@
-Copyright (C) 2024 Thomas Waldmann <tw@waldmann-edv.de>
+Copyright (C) 2024-2025 Thomas Waldmann <tw@waldmann-edv.de>
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/pyproject.toml b/pyproject.toml
index 91f7673..d98ee45 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,23 +6,23 @@ maintainers = [
     {name="Thomas Waldmann", email="tw@waldmann-edv.de"},
 ]
 description = "Memory-efficient hash table (implemented in Cython)"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 keywords = ["hashtable", "memory", "efficient", "dense"]
 classifiers = [
     "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: BSD License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "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",
     "Topic :: Software Development :: Libraries",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-license = {text="BSD"}
+license = "BSD-3-Clause"
+license-files = ["LICENSE.rst"]
 dependencies = []
 
 [project.urls]
@@ -33,7 +33,7 @@ dependencies = []
 borghash-demo = "borghash.__main__:demo"
 
 [build-system]
-requires = ["setuptools", "wheel", "setuptools_scm[toml]>=6.2"]
+requires = ["setuptools>=78.1.1", "wheel", "setuptools_scm[toml]>=6.2"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
@@ -43,7 +43,7 @@ markers = []
 
 
 [tool.tox]
-env_list = ["py39", "py310", "py311", "py312", "py313"]
+env_list = ["py310", "py311", "py312", "py313", "py314"]
 
 [tool.tox.env]