diff --git a/doc/index.rst b/doc/index.rst
index 31cff357..4d419286 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -107,6 +107,15 @@ gives access to many of the documentation strings included in the code.
 Installation and download
 =========================
 
+Supported Python versions
+-------------------------
+
+The :mod:`uncertainties` package supports all versions of Python supported by
+the upstream Python_ project.  As of early 2024, that means versions 3.8
+through 3.12.  It may be possible to support earlier versions if there is user
+demand.  Versions of the :mod:`uncertainties` package up through 3.1.7
+supported Python 2.7 through Python 3.12.
+
 Important note
 --------------
 
diff --git a/setup.py b/setup.py
index 1fdce805..974bcc80 100755
--- a/setup.py
+++ b/setup.py
@@ -1,22 +1,9 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-# !! This program must run with all version of Python since 2.3 included.
-
 import os
 import sys
 
-# setuptools has python_requires, but distutils doesn't, so we test the
-# Python version manually:
-min_version = (2, 7)
-error_msg = ("Sorry, this package is for Python %d.%d and higher only." %
-             min_version)
-try:
-    if sys.version_info < min_version:
-        sys.exit(error_msg)
-except AttributeError:  # sys.version_info was introduced in Python 2.0
-    sys.exit(error_msg)
-
 # Common options for distutils/setuptools's setup():
 setup_options = dict(
     name='uncertainties',
@@ -280,19 +267,12 @@
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        # Python 3.1 failed because of a problem with NumPy 1.6.1 (whereas
-        # everything was fine with Python 3.2 and Python 2.7).
-        'Programming Language :: Python :: 3.1',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        '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 :: Implementation :: Jython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Education',