diff --git a/.coveragerc b/.coveragerc
deleted file mode 100644
index cea27e1..0000000
--- a/.coveragerc
+++ /dev/null
@@ -1,20 +0,0 @@
-[html]
-directory = coverage
-
-[paths]
-source =
-    src/xz/
-    .tox/py*/lib/python*/site-packages/xz/
-    .tox/py*/site-packages/xz/
-
-[report]
-exclude_lines =
-    pragma: no cover
-    def __repr__
-    def __str__
-    if __name__ == "__main__":
-show_missing = True
-
-[run]
-branch = True
-source = xz
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4497ed..a4e58c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,7 +16,9 @@ adheres to [Semantic Versioning](https://semver.org/).
 ### :house: Internal
 
 - Fix test xz files generation for xz-utils 5.5.1+
+- Update license metadata as per [PEP 639](https://peps.python.org/pep-0639)
 - Freeze dev dependencies versions
+- Use `pyproject.toml` and modern build system
 - Update dev dependencies
 - Update GitHub actions dependencies
 - Add tests for PyPy 3.10 and 3.11
diff --git a/mypy.ini b/mypy.ini
deleted file mode 100644
index cd48e59..0000000
--- a/mypy.ini
+++ /dev/null
@@ -1,48 +0,0 @@
-[mypy]
-# section names refer to the documentation
-# https://mypy.readthedocs.io/en/stable/config_file.html
-
-# Import discovery
-files = src
-ignore_missing_imports = False
-follow_imports = normal
-
-# Platform configuration
-python_version = 3.11
-
-# Disallow dynamic typing
-disallow_any_unimported = True
-disallow_any_decorated = True
-disallow_any_generics = True
-disallow_subclassing_any = True
-
-# Untyped definitions and calls
-disallow_untyped_calls = True
-disallow_untyped_defs = True
-disallow_incomplete_defs = True
-check_untyped_defs = True
-disallow_untyped_decorators = True
-
-# None and Optional handling
-no_implicit_optional = True
-strict_optional = True
-
-# Configuring warning
-warn_redundant_casts = True
-warn_unused_ignores = True
-warn_no_return = True
-warn_return_any = True
-warn_unreachable = True
-
-# Suppressing errors
-ignore_errors = False
-
-# Miscellaneous strictness flags
-strict_equality = True
-
-# Configuring error messages
-show_error_context = True
-show_error_codes = True
-
-# Miscellaneous
-warn_unused_configs = True
diff --git a/pyproject.toml b/pyproject.toml
index 32118f4..7decf25 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,135 @@
+[project]
+dynamic = ["version"]
+name = "python-xz"
+authors = [{ name = "Rogdham", email = "contact@rogdham.net" }]
+description = "Pure Python implementation of the XZ file format with random access support"
+readme = { file = "README.md", content-type = "text/markdown" }
+keywords = ["xz", "lzma", "compression", "decompression"]
+license = "MIT"
+license-files = ["LICENSE.txt"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Topic :: Utilities",
+    "Topic :: System :: Archiving",
+    "Topic :: System :: Archiving :: Compression",
+]
+requires-python = ">=3.9"
+
+[project.urls]
+Homepage = "https://github.com/rogdham/python-xz"
+Source = "https://github.com/rogdham/python-xz"
+
+#
+# build
+#
+
+[build-system]
+requires = ["hatchling", "hatch-vcs"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.hooks.vcs]
+template = "__version__ = \"{version}\"\n"
+version-file = "src/xz/_version.py"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/xz"]
+
+[tool.hatch.version]
+source = "vcs"
+
+
+#
+# coverage
+#
+
+[tool.coverage.html]
+directory = "coverage"
+
+[tool.coverage.paths]
+source = [
+    "src/xz/",
+    ".tox/py*/lib/python*/site-packages/xz/",
+    ".tox/py*/site-packages/xz/",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "def __str__",
+    "if __name__ == \"__main__\":",
+    "@overload",
+    "if TYPE_CHECKING:",
+]
+show_missing = true
+
+[tool.coverage.run]
+branch = true
+source = ["xz"]
+
+#
+# mypy
+#
+
+[tool.mypy]
+# Import discovery
+files = "src"
+ignore_missing_imports = false
+follow_imports = "normal"
+# Platform configuration
+python_version = "3.11"
+# Disallow dynamic typing
+disallow_any_unimported = true
+disallow_any_decorated = true
+disallow_any_generics = true
+disallow_subclassing_any = true
+# Untyped definitions and calls
+disallow_untyped_calls = true
+disallow_untyped_defs = true
+disallow_incomplete_defs = true
+check_untyped_defs = true
+disallow_untyped_decorators = true
+# None and Optional handling
+no_implicit_optional = true
+strict_optional = true
+# Configuring warning
+warn_redundant_casts = true
+warn_unused_ignores = true
+warn_no_return = true
+warn_return_any = true
+warn_unreachable = true
+# Suppressing errors
+ignore_errors = false
+# Miscellaneous strictness flags
+strict_equality = true
+# Configuring error messages
+show_error_context = true
+show_error_codes = true
+# Miscellaneous
+warn_unused_configs = true
+
+
+#
+# pytest
+#
+
+[tool.pytest.ini_options]
+addopts = """
+    --cov
+    --strict-markers
+    """
+filterwarnings = ["error"]
+markers = ["generate_integration_files", "integration", "unit"]
+testpaths = ["tests"]
+
+
 #
 # ruff
 #
diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index 89e354b..0000000
--- a/pytest.ini
+++ /dev/null
@@ -1,12 +0,0 @@
-[pytest]
-addopts =
-    --cov
-    --strict-markers
-filterwarnings =
-    error
-markers =
-    generate_integration_files
-    integration
-    unit
-testpaths =
-    tests
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index f04061b..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,35 +0,0 @@
-[metadata]
-name = python-xz
-author = Rogdham
-author_email = contact@rogdham.net
-description = Pure Python implementation of the XZ file format with random access support
-long_description = file: README.md
-long_description_content_type = text/markdown
-url = https://github.com/rogdham/python-xz
-project_urls =
-    Source = https://github.com/rogdham/python-xz
-keywords = xz lzma compression decompression
-license = MIT
-license_files = LICENSE.txt
-platform = any
-classifiers =
-    Development Status :: 3 - Alpha
-    License :: OSI Approved :: MIT License
-    Operating System :: OS Independent
-    Programming Language :: Python
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Topic :: Utilities
-    Topic :: System :: Archiving
-    Topic :: System :: Archiving :: Compression
-
-[options]
-include_package_data = True
-package_dir = =src
-packages = xz
-python_requires = >=3.9
-setup_requires =
-    setuptools_scm==9.2.0
diff --git a/setup.py b/setup.py
deleted file mode 100755
index e5cd3e9..0000000
--- a/setup.py
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env python
-
-from setuptools import setup
-
-setup(
-    use_scm_version={
-        "write_to": "src/xz/_version.py",
-        "write_to_template": '__version__ = "{version}"\n',
-    }
-)
diff --git a/src/xz/open.py b/src/xz/open.py
index 6f52040..1608a14 100644
--- a/src/xz/open.py
+++ b/src/xz/open.py
@@ -80,7 +80,7 @@ def xz_open(
     encoding: Optional[str] = None,
     errors: Optional[str] = None,
     newline: Optional[str] = None,
-) -> XZFile: ...  # pragma: no cover
+) -> XZFile: ...
 
 
 @overload
@@ -97,7 +97,7 @@ def xz_open(
     encoding: Optional[str] = None,
     errors: Optional[str] = None,
     newline: Optional[str] = None,
-) -> _XZFileText: ...  # pragma: no cover
+) -> _XZFileText: ...
 
 
 @overload
@@ -114,7 +114,7 @@ def xz_open(
     encoding: Optional[str] = None,
     errors: Optional[str] = None,
     newline: Optional[str] = None,
-) -> Union[XZFile, _XZFileText]: ...  # pragma: no cover
+) -> Union[XZFile, _XZFileText]: ...
 
 
 def xz_open(
diff --git a/src/xz/strategy.py b/src/xz/strategy.py
index 1479a5a..49115ea 100644
--- a/src/xz/strategy.py
+++ b/src/xz/strategy.py
@@ -1,7 +1,7 @@
 import time
 from typing import TYPE_CHECKING
 
-if TYPE_CHECKING:  # pragma: no cover
+if TYPE_CHECKING:
     # avoid circular dependency
     from xz.block import XZBlock
 
diff --git a/src/xz/typing.py b/src/xz/typing.py
index a8fdeee..5d1c722 100644
--- a/src/xz/typing.py
+++ b/src/xz/typing.py
@@ -5,7 +5,7 @@
 _LZMAFilenameType = Union[str, bytes, PathLike[str], PathLike[bytes], BinaryIO]
 
 
-if TYPE_CHECKING:  # pragma: no cover
+if TYPE_CHECKING:
     # avoid circular dependency
     from xz.block import XZBlock