diff --git a/MANIFEST.in b/MANIFEST.in
index 75d65ae..473f4a5 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -15,8 +15,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-include docs/*
-include docs/source/*
-include docs/source/_static/*
-include docs/source/_templates/*
-include tests/*
+recursive-include docs *
+recursive-exclude docs/build *
+recursive-include tests *
+recursive-exclude tests *.pyc
diff --git a/pyproject.toml b/pyproject.toml
index d998b2e..dd98803 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 # The Flask HTTP Digest Authentication Project.
 # Author: imacat@mail.imacat.idv.tw (imacat), 2022/11/23
 
-#  Copyright (c) 2022 imacat.
+#  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.
@@ -15,6 +15,39 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+[project]
+name = "Flask-DigestAuth"
+version = "0.5.0"
+description = "The Flask HTTP Digest Authentication project."
+readme = "README.rst"
+requires-python = ">=3.7"
+authors = [
+    {name = "imacat", email = "imacat@mail.imacat.idv.tw"},
+]
+keywords = ["flask", "digest-authentication"]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: Apache Software License",
+    "Operating System :: OS Independent",
+    "Framework :: Flask",
+    "Topic :: System :: Systems Administration :: Authentication/Directory",
+    "Intended Audience :: Developers",
+]
+dependencies = [
+    "flask",
+]
+
+[project.optional-dependencies]
+test = [
+    "unittest",
+    "flask-testing",
+]
+
+[project.urls]
+"Documentation" = "https://flask-digestauth.readthedocs.io"
+"Repository" = "https://github.com/imacat/flask-digestauth"
+"Bug Tracker" = "https://github.com/imacat/flask-digestauth/issues"
+
 [build-system]
 requires = ["setuptools>=42"]
 build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 4a851d0..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,53 +0,0 @@
-# The Flask HTTP Digest Authentication Project.
-# Author: imacat@mail.imacat.idv.tw (imacat), 2022/11/23
-
-#  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 = Flask-DigestAuth
-version = 0.5.0
-author = imacat
-author_email = imacat@mail.imacat.idv.tw
-description = The Flask HTTP Digest Authentication project.
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-url = https://github.com/imacat/flask-digestauth
-project_urls =
-    Bug Tracker = https://github.com/imacat/flask-digestauth/issues
-classifiers =
-    Programming Language :: Python :: 3
-    License :: OSI Approved :: Apache Software License
-    Operating System :: OS Independent
-    Framework :: Flask
-    Topic :: System :: Systems Administration :: Authentication/Directory
-    Intended Audience :: Developers
-
-[options]
-package_dir =
-    = src
-packages = find:
-python_requires = >=3.7
-install_requires =
-  flask
-tests_require =
-  unittest
-  flask-testing
-
-[options.packages.find]
-where = src
-
-[options.extras_require]
-flask_login =
-    flask-login