diff --git a/pyproject.toml b/pyproject.toml
index 322b183..0a1593a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,167 @@
 [build-system]
-requires = ["setuptools>=58", "wheel"]
+requires = ["setuptools>=62", "wheel"]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "RBniCSx"
+version = "0.0.dev1"
+authors = [
+    {name = "Francesco Ballarin (and contributors)", email = "francesco.ballarin@unicatt.it"},
+]
+maintainers = [
+    {name = "Francesco Ballarin", email = "francesco.ballarin@unicatt.it"},
+]
+description = "Reduced order modelling in FEniCSx"
+license = {file = "COPYING"}
+requires-python = ">=3.7"
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)",
+    "Operating System :: POSIX",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: MacOS :: MacOS X",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Topic :: Scientific/Engineering :: Mathematics",
+    "Topic :: Software Development :: Libraries :: Python Modules"
+]
+dependencies = [
+    "fenics-dolfinx",
+    "mpi4py",
+    "numpy >= 1.21.0",
+    "petsc4py",
+    "plum-dispatch",
+    "slepc4py"
+]
+
+[project.urls]
+homepage = "https://www.rbnicsproject.org"
+repository = "https://github.com/RBniCS/RBniCSx"
+issues = "https://github.com/RBniCS/RBniCSx/issues"
+funding = "https://github.com/sponsors/francesco-ballarin"
+
+[project.optional-dependencies]
+backends = [
+    "fenics-dolfinx >=0.8.0.dev0, <0.9.0"
+    "multiphenicsx @ git+https://github.com/multiphenics/multiphenicsx.git"
+    "ufl4rom @ git+https://github.com/RBniCS/ufl4rom.git"
+]
+docs = [
+    "sphinx"
+]
+lint = [
+    "flake8",
+    "flake8-annotations",
+    "flake8-docstrings",
+    "flake8-import-restrictions",
+    "flake8-isort",
+    "Flake8-pyproject",
+    "flake8-quotes",
+    "mypy"
+]
+tests = [
+    "coverage[toml]",
+    "nbqa",
+    "nbvalx[unit_tests] @ git+https://github.com/multiphenics/nbvalx.git",
+    "pytest",
+    "scipy"
+]
+tutorials = [
+    "gmsh",
+    "nbvalx[notebooks] @ git+https://github.com/multiphenics/nbvalx.git",
+    "rbnicsx[backends]",
+    "viskex @ git+https://github.com/viskex/viskex.git"
+]
+
+[tool.flake8]
+max-line-length = 120
+show-source = true
+docstring-convention = "numpy"
+inline-quotes = "double"
+imr241_exclude = ["__future__", "rbnicsx", "rbnicsx.*"]
+imr245_include = "*"
+imr245_exclude = ["__future__", "rbnicsx", "rbnicsx.*"]
+ignore = ["ANN101", "W503"]
+exclude = [".eggs", "build", "dist"]
+per-file-ignores = [
+    "rbnicsx/__init__.py: I001, I004",
+    "rbnicsx/**/__init__.py: F401",
+    "tutorials/0*.py: D100, F401, I004",
+    "tutorials/1*.py: D100, F401, I004",
+    "tutorials/**/0*.py: D100, F401, I004",
+    "tutorials/**/1*.py: D100, F401, I004",
+    "tutorials/.imports*.py: D100, F401, I004",
+    "tutorials/**/.imports*.py: D100, F401, I004"
+]
+
+[tool.isort]
+line_length = 120
+multi_line_output = 4
+order_by_type = false
+combine_as_imports = true
+
+[tool.mypy]
+check_untyped_defs = true
+disallow_any_unimported = true
+disallow_untyped_defs = true
+exclude = "(^\\.eggs|^build|^dist|conftest\\.py$)"
+implicit_reexport = true
+no_implicit_optional = true
+pretty = true
+show_error_codes = true
+strict = true
+warn_return_any = true
+warn_unused_ignores = true
+
+[[tool.mypy.overrides]]
+module = "gmsh"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "ipyparallel"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "petsc4py"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "petsc4py.PETSc"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "plotly"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "plotly.*"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "plum"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "slepc4py"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "slepc4py.SLEPc"
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "ufl"
+ignore_missing_imports = true
+
+[tool.setuptools.package-data]
+viskex = ["py.typed"]
+
+[tool.setuptools.packages.find]
+namespaces = false
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index f2e9a3e..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,154 +0,0 @@
-[metadata]
-name = RBniCSx
-version = 0.0.dev1
-author = Francesco Ballarin (and contributors)
-email = francesco.ballarin@unicatt.it
-maintainer = Francesco Ballarin
-description = Reduced order modelling in FEniCSx
-url = https://github.com/RBniCS/RBniCSx
-project_urls =
-    Homepage = https://github.com/RBniCS/RBniCSx
-    Issues = https://github.com/RBniCS/RBniCSx/issues
-long_description = file: README.md
-long_description_content_type = text/markdown
-license = LGPL-3.0-or-later
-classifiers =
-    Development Status :: 3 - Alpha
-    Intended Audience :: Developers
-    Intended Audience :: Science/Research
-    License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)
-    Operating System :: POSIX
-    Operating System :: POSIX :: Linux
-    Operating System :: MacOS :: MacOS X
-    Programming Language :: Python
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Topic :: Scientific/Engineering :: Mathematics
-    Topic :: Software Development :: Libraries :: Python Modules
-
-[options]
-packages = find:
-python_requires = >= 3.7
-setup_requires =
-    setuptools >= 58
-    wheel
-install_requires =
-    cppimport
-    mpi4py
-    numpy >= 1.21.0
-    petsc4py
-    plum-dispatch
-    slepc4py
-
-[options.package_data]
-rbnicsx =
-    _cpp/rbnicsx/**/*.cpp
-    _cpp/rbnicsx/**/*.h
-    py.typed
-
-[options.extras_require]
-backends =
-    fenics-dolfinx
-    multiphenicsx @ git+https://github.com/multiphenics/multiphenicsx.git
-    ufl4rom @ git+https://github.com/RBniCS/ufl4rom.git
-docs =
-    sphinx
-lint =
-    flake8
-    flake8-annotations
-    flake8-docstrings
-    flake8-import-restrictions
-    flake8-isort
-    flake8-quotes
-    mypy
-tests =
-    coverage
-    nbqa
-    nbvalx[unit_tests] @ git+https://github.com/multiphenics/nbvalx.git
-    pytest >= 7.0
-    scipy
-tutorials =
-    rbnicsx[backends]
-    gmsh
-    nbvalx[notebooks] @ git+https://github.com/multiphenics/nbvalx.git
-    viskex @ git+https://github.com/viskex/viskex.git
-
-[flake8]
-max-line-length = 120
-show-source = True
-docstring-convention = numpy
-inline-quotes = double
-imr241_exclude = __future__, rbnicsx, rbnicsx.*
-imr245_include = *
-imr245_exclude = __future__, rbnicsx, rbnicsx.*
-ignore = ANN101, W503
-exclude = .eggs, build, dist
-per-file-ignores =
-    rbnicsx/__init__.py: I001, I004
-    rbnicsx/**/__init__.py: F401
-    tutorials/0*.py: D100, F401, I004
-    tutorials/1*.py: D100, F401, I004
-    tutorials/**/0*.py: D100, F401, I004
-    tutorials/**/1*.py: D100, F401, I004
-    tutorials/.imports*.py: D100, F401, I004
-    tutorials/**/.imports*.py: D100, F401, I004
-
-[isort]
-line_length = 120
-multi_line_output = 4
-order_by_type = False
-combine_as_imports = True
-
-[mypy]
-check_untyped_defs = True
-disallow_any_unimported = True
-disallow_untyped_defs = True
-exclude = (^\.eggs|^build|^dist|conftest\.py$)
-implicit_reexport = True
-no_implicit_optional = True
-pretty = True
-show_error_codes = True
-strict = True
-warn_return_any = True
-warn_unused_ignores = True
-
-[mypy-cppimport]
-ignore_missing_imports = True
-
-[mypy-gmsh]
-ignore_missing_imports = True
-
-[mypy-ipyparallel]
-ignore_missing_imports = True
-
-[mypy-petsc4py]
-ignore_missing_imports = True
-
-[mypy-petsc4py.lib]
-ignore_missing_imports = True
-
-[mypy-petsc4py.PETSc]
-ignore_missing_imports = True
-
-[mypy-plotly]
-ignore_missing_imports = True
-
-[mypy-plotly.*]
-ignore_missing_imports = True
-
-[mypy-plum]
-ignore_missing_imports = True
-
-[mypy-slepc4py]
-ignore_missing_imports = True
-
-[mypy-slepc4py.SLEPc]
-ignore_missing_imports = True
-
-[mypy-ufl]
-ignore_missing_imports = True