diff --git a/.editorconfig b/.editorconfig
index d325166..f8cb9aa 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -25,3 +25,7 @@ indent_size = 2
 # Matches the exact files either package.json or .travis.yml
 [{package.json,.travis.yml}]
 indent_size = 2
+
+# Align TOML indenting with Tombi
+[*.toml]
+indent_size = 2
diff --git a/.gitignore b/.gitignore
index 09f5713..2ed1e34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,3 +62,4 @@ target/
 *.kdev4
 
 .idea
+uv.lock
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 7cbbc79..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,25 +0,0 @@
-# SPDX-FileCopyrightText: 2015, 2016 CERN.
-# SPDX-License-Identifier: BSD-3-Clause
-#
-# In applying this license, CERN does not waive the privileges and immunities
-# granted to it by virtue of its status as an Intergovernmental Organization
-# or submit itself to any jurisdiction.
-
-include *.rst
-include .coveragerc
-include .editorconfig
-include docs/*.py
-include docs/*.rst
-include docs/Makefile
-include docs/requirements.txt
-include .lgtm
-include LICENSE
-include MAINTAINERS
-include pytest.ini
-include run-tests.sh
-recursive-include *.py *.css *.css_t *.conf *.html
-recursive-include docs *.py
-recursive-include tests *.py
-recursive-include .github/workflows *.yml
-include .git-blame-ignore-revs
-include .readthedocs.yaml
diff --git a/pyproject.toml b/pyproject.toml
index ec4e1ea..26010bb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,61 @@
+# SPDX-FileCopyrightText: 2015-2022 CERN.
+# SPDX-FileCopyrightText: 2022 Graz University of Technology.
+# SPDX-FileCopyrightText: 2026 TU Wien.
+# SPDX-License-Identifier: MIT
+
+[project]
+name = "idutils"
+description = "Small library for persistent identifiers used in scholarly communication."
+readme = "README.rst"
+requires-python = ">=3.9"
+license = "BSD-3-Clause"
+authors = [
+  { name = "Invenio Software", email = "info@inveniosoftware.org" },
+]
+keywords = [
+  "identifiers",
+  "persistent",
+]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+]
+dependencies = [
+  "isbnlib2>=3.11.7",
+]
+dynamic = ["version"]
+
+[project.urls]
+Repository = "https://github.com/inveniosoftware/idutils"
+
+[project.optional-dependencies]
+docs = []
+tests = [
+  "pytest-black-ng>=0.4.0",
+  "pytest-cache>=1.0",
+  "pytest-invenio>=1.4.0",
+  "pytest-runner>=2.6.2",
+  "sphinx>=4.5",
+]
+
 [build-system]
-requires = ["setuptools", "wheel", "babel>2.8"]
-build-backend = "setuptools.build_meta"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.version]
+path = "idutils/__init__.py"
+
+[tool.hatch.build.targets.sdist]
+include = [
+  "/idutils",
+]
+
+[tool.isort]
+profile = "black"
+
+[tool.pydocstyle]
+add_ignore = ""
+
+[tool.pytest.ini_options]
+addopts = '--black --isort --pydocstyle --doctest-glob="*.rst" --doctest-modules --cov=idutils --cov-report=term-missing'
+testpaths = "tests idutils"
+live_server_scope = "module"
diff --git a/run-tests.sh b/run-tests.sh
index e8e3a61..2b0e3a2 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -9,6 +9,5 @@ set -o errexit
 # Quit on unbound symbols
 set -o nounset
 
-python -m check_manifest
 python -m sphinx.cmd.build -qnNW docs docs/_build/html
 python -m pytest
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 25296bf..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,58 +0,0 @@
-# SPDX-FileCopyrightText: 2016 CERN.
-# SPDX-FileCopyrightText: 2022 Graz University of Technology.
-# SPDX-License-Identifier: BSD-3-Clause
-#
-# In applying this license, CERN does not waive the privileges and immunities
-# granted to it by virtue of its status as an Intergovernmental Organization
-# or submit itself to any jurisdiction.
-
-[metadata]
-name = idutils
-version = attr: idutils.__version__
-description = "Small library for persistent identifiers used in scholarly communication."
-long_description = file: README.rst, CHANGES.rst
-keywords = persistent identifiers
-license = Revised BSD License
-author = Invenio Software
-author_email = info@inveniosoftware.org
-platforms = any
-url = https://github.com/inveniosoftware/idutils
-classifiers =
-    Development Status :: 5 - Production/Stable
-
-[options]
-include_package_data = True
-packages = find:
-python_requires = >=3.7
-zip_safe = False
-install_requires =
-    isbnlib2>=3.11.7
-
-[options.extras_require]
-tests =
-    pytest-black-ng>=0.4.0
-    pytest-cache>=1.0
-    pytest-invenio>=1.4.0  # required for fixtures
-    pytest-runner>=2.6.2
-    sphinx>=4.5
-# Kept for backwards compatibility
-docs =
-
-[build_sphinx]
-source-dir = docs/
-build-dir  = docs/_build
-all_files  = 1
-
-[bdist_wheel]
-universal = 1
-
-[isort]
-profile=black
-
-[check-manifest]
-ignore =
-    *-requirements.txt
-
-[tool:pytest]
-addopts = --black --isort --pydocstyle --doctest-glob="*.rst" --doctest-modules --cov=idutils --cov-report=term-missing
-testpaths = tests idutils
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 897b28e..0000000
--- a/setup.py
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-FileCopyrightText: 2015-2022 CERN.
-# SPDX-FileCopyrightText: 2022 Graz University of Technology.
-# SPDX-License-Identifier: BSD-3-Clause
-#
-# In applying this license, CERN does not waive the privileges and immunities
-# granted to it by virtue of its status as an Intergovernmental Organization
-# or submit itself to any jurisdiction.
-
-
-"""Small library for persistent identifiers used in scholarly communication."""
-
-from setuptools import setup
-
-setup()