diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 774323b6..8e070737 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,12 +16,9 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         sphinx-version:
           ["sphinx==6.0", "sphinx==6.2", "sphinx==7.0", "'sphinx>=7.2,<7.3'"]
-        exclude:
-          - python-version: "3.8"
-            sphinx-version: "'sphinx>=7.2,<7.3'"
     steps:
       - uses: actions/checkout@v4
 
diff --git a/README.rst b/README.rst
index a5af9a00..87661b6f 100644
--- a/README.rst
+++ b/README.rst
@@ -18,7 +18,7 @@ docstrings formatted according to the NumPy documentation format.
 The extension also adds the code description directives
 ``np:function``, ``np-c:function``, etc.
 
-numpydoc requires Python 3.8+ and sphinx 5+.
+numpydoc requires Python 3.9+ and sphinx 6+.
 
 For usage information, please refer to the `documentation
 <https://numpydoc.readthedocs.io/>`_.
diff --git a/doc/install.rst b/doc/install.rst
index 480bd59a..6282ffed 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -5,7 +5,7 @@ Getting started
 Installation
 ============
 
-This extension requires Python 3.8+, sphinx 5+ and is available from:
+This extension requires Python 3.9+, sphinx 6+ and is available from:
 
 * `numpydoc on PyPI <http://pypi.python.org/pypi/numpydoc>`_
 * `numpydoc on GitHub <https://github.com/numpy/numpydoc/>`_
diff --git a/numpydoc/tests/test_validate.py b/numpydoc/tests/test_validate.py
index eb00f896..c66f9ee9 100644
--- a/numpydoc/tests/test_validate.py
+++ b/numpydoc/tests/test_validate.py
@@ -1,5 +1,4 @@
 import pytest
-import sys
 import warnings
 from contextlib import nullcontext
 from functools import cached_property, partial, wraps
@@ -1638,15 +1637,12 @@ def test_raises_for_invalid_attribute_name(self, invalid_name):
         with pytest.raises(AttributeError, match=msg):
             numpydoc.validate.Validator._load_obj(invalid_name)
 
-    # inspect.getsourcelines does not return class decorators for Python 3.8. This was
-    # fixed starting with 3.9: https://github.com/python/cpython/issues/60060.
     @pytest.mark.parametrize(
         ["decorated_obj", "def_line"],
         [
             [
                 "numpydoc.tests.test_validate.DecoratorClass",
-                getsourcelines(DecoratorClass)[-1]
-                + (2 if sys.version_info.minor > 8 else 0),
+                getsourcelines(DecoratorClass)[-1] + 2,
             ],
             [
                 "numpydoc.tests.test_validate.DecoratorClass.test_no_decorator",
diff --git a/pyproject.toml b/pyproject.toml
index c76d2192..f7543f3a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ requires = ['setuptools>=61.2']
 name = 'numpydoc'
 description = 'Sphinx extension to support docstrings in Numpy format'
 readme = 'README.rst'
-requires-python = '>=3.8'
+requires-python = '>=3.9'
 dynamic = ['version']
 keywords = [
     'sphinx',
@@ -19,7 +19,6 @@ classifiers = [
     'Topic :: Documentation',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',