diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e150bf7..80e3965 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -54,10 +54,6 @@ repos:
   #     - id: reorder-python-imports
   #       args:
   #         - --py37-plus
-  - repo: https://github.com/asottile/setup-cfg-fmt
-    rev: v2.8.0
-    hooks:
-      - id: setup-cfg-fmt
   - repo: https://github.com/psf/black
     rev: 25.1.0
     hooks:
diff --git a/pyproject.toml b/pyproject.toml
index 70d1386..1b271c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,15 +1,77 @@
+# ======================================================================================
+# Project metadata
+# ======================================================================================
+[project]
+name               = "upper_envelope"
+description        = "Upper envelope scan for dynamic discrete-continuous life cycle models."
+requires-python    = ">=3.10"
+authors            = [
+  { name="Max Blesch", email="maximilian.blesch@hu-berlin.de" },
+  { name="Sebastian Gsell", email="sebastian.gsell@econ.lmu.de" },
+]
+classifiers        = [
+  "Development Status :: 1 - Planning",
+  "Intended Audience :: Science/Research",
+  "Operating System :: MacOS :: MacOS X",
+  "Operating System :: Microsoft :: Windows",
+  "Operating System :: POSIX",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3 :: Only",
+  "Topic :: Scientific/Engineering",
+  "Topic :: Software Development :: Build Tools",
+]
+keywords           = []       # if you have any
+dependencies       = []       # list runtime deps here, e.g. ["numpy>=1.25"]
+dynamic = ["version"]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.license]
+text = "MIT"
+
+[project.urls]
+"Github" = "https://github.com/OpensourceEconomics/upper-envelope"
+
+[project.scripts]
+upper_envelope = "upper_envelope.cli:cli"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+
+# ======================================================================================
+# Build system configuration
+# ======================================================================================
+
 [build-system]
-requires = ["setuptools>=45", "wheel", "setuptools_scm[toml]>=6.0"]
+requires = [
+  "setuptools>=61.0.0",  # setuptools PEP-621 support
+  "wheel",
+  "setuptools_scm[toml]>=6.0"
+]
+build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
 write_to = "src/upper_envelope/_version.py"
 
+
+# ======================================================================================
+# Ruff configuration
+# ======================================================================================
+
 [tool.ruff]
 target-version = "py310"
-fix = true
-ignore = ["F401"]
+fix            = true
+ignore         = ["F401"]
+
+
+# ======================================================================================
+# Misc configuration
+# ======================================================================================
 
 [tool.yamlfix]
-line_length = 88
-sequence_style = "block_style"
+line_length         = 88
+sequence_style      = "block_style"
 none_representation = "null"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 40bd090..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,41 +0,0 @@
-[metadata]
-name = upper_envelope
-description = Upper envelope scan for dynamic discrete-continuous life cycle models.
-long_description = file: README.md
-long_description_content_type = text/markdown
-author = "Max Blesch, Sebastian Gsell"
-author_email = "maximilian.blesch@hu-berlin.de, sebastian.gsell@econ.lmu.de"
-license = MIT
-license_files = LICENSE
-platforms = unix, linux, osx, cygwin, win32
-classifiers =
-    Development Status :: 1 - Planning
-    Intended Audience :: Science/Research
-    Operating System :: MacOS :: MacOS X
-    Operating System :: Microsoft :: Windows
-    Operating System :: POSIX
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3 :: Only
-    Topic :: Scientific/Engineering
-    Topic :: Software Development :: Build Tools
-project_urls =
-    Github = https://github.com/OpensourceEconomics/upper-envelope
-
-[options]
-packages = find:
-python_requires = >=3.9
-include_package_data = True
-package_dir =
-    =src
-zip_safe = False
-
-[options.packages.find]
-where = src
-
-[options.entry_points]
-console_scripts =
-    upper_envelope=upper_envelope.cli:cli
-
-[check-manifest]
-ignore =
-    src/upper_envelope/_version.py
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 7f1a176..0000000
--- a/setup.py
+++ /dev/null
@@ -1,4 +0,0 @@
-from setuptools import setup
-
-if __name__ == "__main__":
-    setup()