diff --git a/MANIFEST.in b/MANIFEST.in
index 1fbcfc4..e469a29 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -15,17 +15,14 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+recursive-include src/accounting/static *
 exclude src/accounting/static/js/dummy.js
-include src/accounting/translations/*
-include src/accounting/translations/*/LC_MESSAGES/*
-include docs/*
-include docs/source/*
-include docs/source/_static/*
-include docs/source/_templates/*
-include tests/*
+recursive-include src/accounting/templates *
+recursive-include src/accounting/translations *
+recursive-include src/accounting/data *
+recursive-include docs *
+recursive-exclude docs/build *
+recursive-include tests *
 exclude tests/test_temp.py
-include tests/test_site/*
-include tests/test_site/static/*
-include tests/test_site/templates/*
-include tests/test_site/translations/*
-include tests/test_site/translations/*/LC_MESSAGES/*
+recursive-exclude tests *.pyc
+recursive-exclude tests/instance *
diff --git a/pyproject.toml b/pyproject.toml
index dc6f629..20e8575 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,51 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+[project]
+name = "mia-accounting"
+version = "0.11.1"
+description = "A Flask accounting module."
+readme = "README.rst"
+requires-python = ">=3.11"
+authors = [
+    {name = "imacat", email = "imacat@mail.imacat.idv.tw"},
+]
+keywords = ["mia", "accounting", "flask"]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: Apache Software License",
+    "Operating System :: OS Independent",
+    "Framework :: Flask",
+    "Topic :: Office/Business :: Financial :: Accounting",
+]
+dependencies = [
+    "flask",
+    "Flask-SQLAlchemy",
+    "Flask-WTF",
+    "Flask-Babel >= 3",
+    "Flask-Babel-JS",
+]
+
+[project.optional-dependencies]
+test = [
+    "unittest",
+    "httpx",
+    "OpenCC",
+]
+
+[project.urls]
+"Documentation" = "https://mia-accounting.readthedocs.io"
+"Repository" = "https://github.com/imacat/mia-accounting"
+"Bug Tracker" = "https://github.com/imacat/mia-accounting/issues"
+"Demonstration" = "https://accounting.imacat.idv.tw"
+
 [build-system]
 requires = ["setuptools>=42"]
 build-backend = "setuptools.build_meta"
+
+[tool.setuptools.exclude-package-data]
+"*" = [
+    "babel.cfg",
+    "*.pot",
+    "*.po",
+]
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 32eee32..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,56 +0,0 @@
-# The Mia! Accounting Project.
-# Author: imacat@mail.imacat.idv.tw (imacat), 2022/8/21
-
-#  Copyright (c) 2022-2023 imacat.
-#
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-
-[metadata]
-name = mia-accounting
-version = 0.11.1
-author = imacat
-author_email = imacat@mail.imacat.idv.tw
-description = The Mia! Accounting project.
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-url = https://github.com/imacat/mia-accounting
-project_urls =
-    Bug Tracker = https://github.com/imacat/mia-accounting/issues
-classifiers =
-    Programming Language :: Python :: 3
-    License :: OSI Approved :: Apache Software License
-    Operating System :: OS Independent
-    Framework :: Flask
-    Topic :: Office/Business :: Financial :: Accounting
-
-[options]
-package_dir =
-    = src
-python_requires = >=3.11
-install_requires =
-  flask
-  Flask-SQLAlchemy
-  Flask-WTF
-  Flask-Babel >= 3
-  Flask-Babel-JS
-tests_require =
-  unittest
-  httpx
-  OpenCC
-
-[options.package_data]
-accounting =
-  static/**
-  templates/**
-  translations/*/LC_MESSAGES/*.mo
-  data/**