diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 08b53fb..6cd024e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,7 +52,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v7
 
@@ -80,10 +80,11 @@ jobs:
       # deploys.  Add a row here when a new PostgreSQL major is released.
       matrix:
         include:
-          - {python: "3.8", postgres: "13"}
+          - {python: "3.9", postgres: "13"}
           - {python: "3.11", postgres: "15"}
           - {python: "3.12", postgres: "16"}
           - {python: "3.13", postgres: "17"}
+          - {python: "3.14", postgres: "18"}
     services:
       postgres:
         image: postgres:${{ matrix.postgres }}
diff --git a/psycodict/__init__.py b/psycodict/__init__.py
index 7275c6f..cf7d297 100644
--- a/psycodict/__init__.py
+++ b/psycodict/__init__.py
@@ -25,6 +25,10 @@
 
 """
 
+# Single source of truth for the package version: pyproject.toml reads it via
+# ``[tool.setuptools.dynamic]``, and it works from an uninstalled checkout too.
+__version__ = "0.1.13"
+
 try:
     import psycopg
     assert psycopg
diff --git a/pyproject.toml b/pyproject.toml
index 02f5232..711c09f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,17 +1,20 @@
 [build-system]
-requires = ["setuptools", "wheel"]
+# setuptools >= 77 implements PEP 639, required for the SPDX `license` string
+# below; it is available on every interpreter >= 3.9.
+requires = ["setuptools>=77"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "psycodict"
-version = "0.1.13"
+# Version lives in psycodict/__init__.py (__version__); see [tool.setuptools.dynamic].
+dynamic = ["version"]
 description = "dictionary-based python interface to PostgreSQL databases"
 # Required by the `twine check --strict` gate in CI: without it the package
 # has no long_description and the PyPI project page renders empty.
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [{name = "David Roe", email = "roed.math@gmail.com"}, {name = "Edgar Costa", email = "edgarc@mit.edu"}]
-license = {text = "GPL v2+"}
+license = "GPL-2.0-or-later"
 keywords = ["postgres", "database", "interface"]
 
 [project.urls]
@@ -23,6 +26,9 @@ pgsource = ["psycopg>=3.1"]
 pgbinary = ["psycopg[binary]>=3.1"]
 test = ["pytest>=7"]
 
+[tool.setuptools.dynamic]
+version = {attr = "psycodict.__version__"}
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 markers = [
@@ -34,7 +40,7 @@ log_cli_level = "WARNING"
 filterwarnings = ["error::DeprecationWarning:psycodict.*"]
 
 [tool.ruff]
-target-version = "py38"
+target-version = "py39"
 
 [tool.ruff.lint.per-file-ignores]
 # The psycopg2 availability check in __init__.py deliberately runs before the