diff --git a/ci/travis.sh b/ci/travis.sh
index 7098011..5ece58f 100755
--- a/ci/travis.sh
+++ b/ci/travis.sh
@@ -54,8 +54,8 @@ fi
 pip install -U pip setuptools wheel
 
 if [ "$CHECK_FORMATTING" = "1" ]; then
-    pip install black
-    if ! black --check --diff setup.py exceptiongroup; then
+    pip install black==20.8b1
+    if ! black --check --diff setup.py exceptiongroup docs; then
         cat <<EOF
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
@@ -63,7 +63,7 @@ if [ "$CHECK_FORMATTING" = "1" ]; then
 Formatting problems were found (listed above). To fix them, run
 
    pip install black
-   black setup.py exceptiongroup
+   black setup.py exceptiongroup docs
 
 in your local checkout.
 
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 87e4454..1cce7a2 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -19,8 +19,9 @@
 #
 import os
 import sys
+
 # So autodoc can import our package
-sys.path.insert(0, os.path.abspath('../..'))
+sys.path.insert(0, os.path.abspath("../.."))
 
 # Warn about all references to unknown targets
 nitpicky = True
@@ -40,16 +41,16 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.intersphinx',
-    'sphinx.ext.coverage',
-    'sphinx.ext.napoleon',
-    'sphinxcontrib_trio',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.coverage",
+    "sphinx.ext.napoleon",
+    "sphinxcontrib_trio",
 ]
 
 intersphinx_mapping = {
-    "python": ('https://docs.python.org/3', None),
-    "trio": ('https://trio.readthedocs.io/en/stable', None),
+    "python": ("https://docs.python.org/3", None),
+    "trio": ("https://trio.readthedocs.io/en/stable", None),
 }
 
 autodoc_member_order = "bysource"
@@ -61,15 +62,15 @@
 # You can specify multiple suffix as a list of string:
 #
 # source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = 'exceptiongroup'
-copyright = 'The exceptiongroup authors'
-author = 'The exceptiongroup authors'
+project = "exceptiongroup"
+copyright = "The exceptiongroup authors"
+author = "The exceptiongroup authors"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -77,6 +78,7 @@
 #
 # The short X.Y version.
 import exceptiongroup
+
 version = exceptiongroup.__version__
 # The full version, including alpha/beta/rc tags.
 release = version
@@ -94,10 +96,10 @@
 exclude_patterns = []
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # The default language for :: blocks
-highlight_language = 'python3'
+highlight_language = "python3"
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -108,13 +110,14 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-#html_theme = 'alabaster'
+# html_theme = 'alabaster'
 
 # We have to set this ourselves, not only because it's useful for local
 # testing, but also because if we don't then RTD will throw away our
 # html_theme_options.
 import sphinx_rtd_theme
-html_theme = 'sphinx_rtd_theme'
+
+html_theme = "sphinx_rtd_theme"
 html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 
 # Theme options are theme-specific and customize the look and feel of a theme
@@ -134,13 +137,13 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 
 # -- Options for HTMLHelp output ------------------------------------------
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'exceptiongroupdoc'
+htmlhelp_basename = "exceptiongroupdoc"
 
 
 # -- Options for LaTeX output ---------------------------------------------
@@ -149,15 +152,12 @@
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',
-
     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',
-
     # Additional stuff for the LaTeX preamble.
     #
     # 'preamble': '',
-
     # Latex figure (float) alignment
     #
     # 'figure_align': 'htbp',
@@ -167,8 +167,7 @@
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'exceptiongroup.tex', 'Trio Documentation',
-     author, 'manual'),
+    (master_doc, "exceptiongroup.tex", "Trio Documentation", author, "manual"),
 ]
 
 
@@ -177,8 +176,7 @@
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'exceptiongroup', 'exceptiongroup Documentation',
-     [author], 1)
+    (master_doc, "exceptiongroup", "exceptiongroup Documentation", [author], 1)
 ]
 
 
@@ -188,7 +186,13 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'exceptiongroup', 'exceptiongroup Documentation',
-     author, 'exceptiongroup', 'A way to represent multiple things going wrong at the same time, in Python',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "exceptiongroup",
+        "exceptiongroup Documentation",
+        author,
+        "exceptiongroup",
+        "A way to represent multiple things going wrong at the same time, in Python",
+        "Miscellaneous",
+    ),
 ]
diff --git a/exceptiongroup/_tools.py b/exceptiongroup/_tools.py
index a380334..0c2554d 100644
--- a/exceptiongroup/_tools.py
+++ b/exceptiongroup/_tools.py
@@ -7,7 +7,7 @@
 
 
 def split(exc_type, exc, *, match=None):
-    """ splits the exception into one half (matched) representing all the parts of
+    """splits the exception into one half (matched) representing all the parts of
     the exception that match the predicate, and another half (not matched)
     representing all the parts that don't match.
 
diff --git a/exceptiongroup/_version.py b/exceptiongroup/_version.py
index 490c03a..cdf1d9a 100644
--- a/exceptiongroup/_version.py
+++ b/exceptiongroup/_version.py
@@ -1,3 +1,3 @@
-# This file is imported from __init__.py and exec'd from setup.py
+# This file is imported from __init__.py and AST-parsed from setuptools
 
 __version__ = "0.0.0"
diff --git a/pyproject.toml b/pyproject.toml
index a0ebcad..ca329df 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,7 @@
+[build-system]
+requires = ["setuptools >= 46.4.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
 [tool.towncrier]
 package = "exceptiongroup"
 filename = "docs/source/history.rst"
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000..bec5674
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,31 @@
+[metadata]
+name = exceptiongroup
+version = attr: exceptiongroup._version.__version__
+description = A way to represent multiple things going wrong at the same time, in Python
+url = https://github.com/python-trio/exceptiongroup
+long_description = file: README.rst
+long_description_content_type = text/x-rst
+author = Nathaniel J. Smith
+author_email = njs@pobox.com
+license = MIT -or- Apache License 2.0
+keywords =
+    async
+    exceptions
+    error handling
+classifiers =
+    License :: OSI Approved :: MIT License
+    License :: OSI Approved :: Apache Software License
+    Framework :: Trio
+    Framework :: AsyncIO
+    Operating System :: POSIX :: Linux
+    Operating System :: MacOS :: MacOS X
+    Operating System :: Microsoft :: Windows
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Intended Audience :: Developers
+
+[options]
+packages = find:
+install_requires = trio
+python_requires = >=3.5
diff --git a/setup.py b/setup.py
index 9b1f6d6..6068493 100644
--- a/setup.py
+++ b/setup.py
@@ -1,33 +1,3 @@
-from setuptools import setup, find_packages
+from setuptools import setup
 
-exec(open("exceptiongroup/_version.py", encoding="utf-8").read())
-
-LONG_DESC = open("README.rst", encoding="utf-8").read()
-
-setup(
-    name="exceptiongroup",
-    version=__version__,
-    description="A way to represent multiple things going wrong at the same time, in Python",
-    url="https://github.com/python-trio/exceptiongroup",
-    long_description=LONG_DESC,
-    author="Nathaniel J. Smith",
-    author_email="njs@pobox.com",
-    license="MIT -or- Apache License 2.0",
-    packages=find_packages(),
-    install_requires=["trio"],
-    keywords=["async", "exceptions", "error handling"],
-    python_requires=">=3.5",
-    classifiers=[
-        "License :: OSI Approved :: MIT License",
-        "License :: OSI Approved :: Apache Software License",
-        "Framework :: Trio",
-        "Framework :: AsyncIO",
-        "Operating System :: POSIX :: Linux",
-        "Operating System :: MacOS :: MacOS X",
-        "Operating System :: Microsoft :: Windows",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: Implementation :: PyPy",
-        "Intended Audience :: Developers",
-    ],
-)
+setup()