diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba82782..e370c50 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.4.2 - 2026-01-14
+
+### Fixed
+
+- Enhanced `setup.cfg` with complete metadata.
+- Simplified `setup.py` to just call `setup()`.
+
 ## 0.4.1 - 2026-01-14
 
 ### Fixed
diff --git a/setup.cfg b/setup.cfg
index 0c9e0fc..22d6c7e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,40 @@
 [metadata]
+name = sphinx-togglebutton
+version = attr: sphinx_togglebutton.__version__
+description = Toggle page content and collapse admonitions in Sphinx.
+long_description = file: README.md
+long_description_content_type = text/markdown
+author = Chris Holdgraf
+author_email = choldgraf@berkeley.edu
+url = https://github.com/executablebooks/sphinx-togglebutton
+license = MIT License
 license_file = LICENSE
+classifiers =
+    License :: OSI Approved :: MIT License
+
+[options]
+packages = find:
+install_requires =
+    setuptools
+    wheel
+    sphinx
+    docutils
+
+[options.extras_require]
+sphinx =
+    matplotlib
+    numpy
+    myst_nb
+    sphinx_book_theme
+    sphinx_design
+    sphinx_examples
+
+[options.package_data]
+sphinx_togglebutton =
+    _static/togglebutton.css
+    _static/togglebutton.js
+    _static/togglebutton-chevron.svg
+    translations/README.md
+    translations/_convert.py
+    translations/jsons/*.json
+    translations/locales/**/*
diff --git a/setup.py b/setup.py
index 720b60c..6068493 100644
--- a/setup.py
+++ b/setup.py
@@ -1,49 +1,3 @@
-from pathlib import Path
+from setuptools import setup
 
-from setuptools import find_packages, setup
-
-version = [
-    line
-    for line in Path("sphinx_togglebutton/__init__.py").read_text().split("\n")
-    if "__version__" in line
-]
-version = version[0].split(" = ")[-1].strip('"')
-
-with open("./README.md", "r") as ff:
-    readme_text = ff.read()
-
-setup(
-    name="sphinx-togglebutton",
-    version=version,
-    description="Toggle page content and collapse admonitions in Sphinx.",
-    long_description=readme_text,
-    long_description_content_type="text/markdown",
-    author="Chris Holdgraf",
-    author_email="choldgraf@berkeley.edu",
-    url="https://github.com/executablebooks/sphinx-togglebutton",
-    license="MIT License",
-    packages=find_packages(),
-    package_data={
-        "sphinx_togglebutton": [
-            "_static/togglebutton.css",
-            "_static/togglebutton.js",
-            "_static/togglebutton-chevron.svg",
-            "translations/README.md",
-            "translations/_convert.py",
-            "translations/jsons/*.json",
-            "translations/locales/**/*",
-        ]
-    },
-    install_requires=["setuptools", "wheel", "sphinx", "docutils"],
-    extras_require={
-        "sphinx": [
-            "matplotlib",
-            "numpy",
-            "myst_nb",
-            "sphinx_book_theme",
-            "sphinx_design",
-            "sphinx_examples",
-        ]
-    },
-    classifiers=["License :: OSI Approved :: MIT License"],
-)
+setup()
diff --git a/sphinx_togglebutton/__init__.py b/sphinx_togglebutton/__init__.py
index 323310f..cd5687d 100644
--- a/sphinx_togglebutton/__init__.py
+++ b/sphinx_togglebutton/__init__.py
@@ -9,7 +9,7 @@
 MESSAGE_CATALOG_NAME = "togglebutton"
 translate = get_translation(MESSAGE_CATALOG_NAME)
 
-__version__ = "0.4.1"
+__version__ = "0.4.2"
 
 
 def st_static_path(app):