diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8a3c8623257..85d02ca5a94 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -161,9 +161,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
         cache: "pip"
         cache-dependency-path: |
-          setup.py
           pyproject.toml
-          dev-requirements.txt
 
     - name: Get wheels
       uses: actions/download-artifact@v3
@@ -172,10 +170,7 @@ jobs:
 
     - name: Install wheel
       run: |
-        find . -name "*.whl" -exec pip install {} \;
-
-    - name: Install dependencies
-      run: pip install -r dev-requirements.txt
+        find . -name "*.whl" -exec pip install "{}[dev]" \;
 
     - name: Make test directory
       run: |
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 17252f1b2e0..bc13c7b2b21 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -36,8 +36,7 @@ jobs:
 
     - name: Install with dependencies
       run: |
-        pip install .
-        pip install -r dev-requirements.txt
+        pip install ".[dev]"
 
     - name: Test GUI
       if: matrix.test-type == 'gui-tests'
diff --git a/.github/workflows/doctest.yml b/.github/workflows/doctest.yml
index 1bb29c70392..dd5e5d33149 100644
--- a/.github/workflows/doctest.yml
+++ b/.github/workflows/doctest.yml
@@ -30,12 +30,7 @@ jobs:
         cache-dependency-path: |
           setup.py
           pyproject.toml
-          dev-requirements.txt
-    - run: pip install -e .
-
-    - name: Install with dependencies
-      run: |
-        pip install -r dev-requirements.txt
+    - run: pip install -e ".[dev]"
 
     - name: Test doctest
       run: |
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 31c389558e8..e70b4fc6788 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -32,11 +32,10 @@ jobs:
         cache-dependency-path: |
           setup.py
           pyproject.toml
-          style-requirements.txt
 
-    - name: Install dependencies
+    - name: Install ERT with style dependencies
       run: |
-        pip install -r style-requirements.txt
+        pip install ".[style]"
 
     - name: Clang Format
       run: ./script/clang-format --check
@@ -59,5 +58,4 @@ jobs:
 
     - name: Run pylint
       run: |
-        pip install .  # We need the dependencies of ERT to avoid import-error
         script/pylint
diff --git a/.github/workflows/test_ert.yml b/.github/workflows/test_ert.yml
index 2bfb6946b79..4cf6544706d 100644
--- a/.github/workflows/test_ert.yml
+++ b/.github/workflows/test_ert.yml
@@ -29,7 +29,6 @@ jobs:
         cache-dependency-path: |
           setup.py
           pyproject.toml
-          dev-requirements.txt
 
     - name: Get wheels
       uses: actions/download-artifact@v3
@@ -38,10 +37,7 @@ jobs:
 
     - name: Install wheel
       run: |
-        find . -name "*.whl" -exec pip install {} \;
-
-    - name: Install dependencies
-      run: pip install -r dev-requirements.txt
+        find . -name "*.whl" -exec pip install "{}[dev]" \;
 
     - name: Test GUI
       if: inputs.test-type == 'gui-test'
diff --git a/.github/workflows/typing.yml b/.github/workflows/typing.yml
index a1a87912fd2..2b7c2a95566 100644
--- a/.github/workflows/typing.yml
+++ b/.github/workflows/typing.yml
@@ -30,13 +30,11 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install ERT and dependencies
       run: |
-        pip install .
+        pip install ".[dev, types]"
     - name: Install dependencies
     # type checking requires protobuf stubs
       run: |
         python -m pip install --upgrade pip
-        python -m pip install -r types-requirements.txt
-        python -m pip install -r dev-requirements.txt
         python -m pip install grpcio-tools
         python -m grpc_tools.protoc -I src/_ert_com_protocol --mypy_out=src/_ert_com_protocol src/_ert_com_protocol/_schema.proto
     - run: echo ::add-matcher::.github/mypy-matcher.json
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index f22122d0bfd..c844dd6eeeb 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,10 +1,11 @@
 version: 2
 
 python:
-   install:
-   - requirements: dev-requirements.txt
-   - method: pip
-     path: .
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - dev
 
 sphinx:
   builder: html
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b943e44e225..65c97d60ac0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -69,7 +69,7 @@ noise in the review process.
 
 You can build the documentation after installation by running
 ```bash
-pip install -r dev-requirements.txt
+pip install "ert[dev]" 
 sphinx-build -n -v -E -W ./docs ./tmp/ert_docs
 ```
 and then open the generated `./tmp/ert_docs/index.html` in a browser.
diff --git a/README.md b/README.md
index d39c7b06d28..bd04d6c76ce 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,7 @@ pip install --editable .
 Additional development packages must be installed to run the test suite:
 
 ```sh
-pip install -r dev-requirements.txt
+pip install "ert[dev]" 
 pytest tests/
 ```
 
diff --git a/ci/run_ert_ctests.sh b/ci/run_ert_ctests.sh
index a2f426576e0..6d113b1870b 100644
--- a/ci/run_ert_ctests.sh
+++ b/ci/run_ert_ctests.sh
@@ -60,8 +60,7 @@ build_ert_clib () {
 
 build_ert_dev () {
 	enable_environment
-	pip install ${ERT_SOURCE_ROOT}
-	pip install -r ${ERT_SOURCE_ROOT}/dev-requirements.txt
+	pip install "${ERT_SOURCE_ROOT}[dev]"
 }
 
 run_ctest () {
diff --git a/ci/testkomodo.sh b/ci/testkomodo.sh
index 93ab47255d0..0d5d7f451fd 100755
--- a/ci/testkomodo.sh
+++ b/ci/testkomodo.sh
@@ -12,7 +12,7 @@ copy_test_files () {
 }
 
 install_test_dependencies () {
-    pip install -r dev-requirements.txt
+    pip install "ert[dev]"
 }
 
 run_ert_with_opm () {
diff --git a/dev-requirements.txt b/dev-requirements.txt
deleted file mode 100644
index bf3f9701934..00000000000
--- a/dev-requirements.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-click
-decorator
-ecl_data_io
-furo
-flaky
-grpcio-tools
-hypothesis<=6.83.0;python_version=='3.8' # ipython pinned to 8.12.2 for python 3.8 support
-hypothesis;python_version>='3.9'
-jsonpath_ng
-jupytext
-oil_reservoir_synthesizer
-pytest-asyncio
-pytest-benchmark
-pytest-cov
-pytest-memray
-pytest-mock
-pytest-mpl
-pytest-qt
-pytest-raises
-pytest-snapshot
-pytest-timeout
-pytest-xdist
-pytest>6
-requests
-scikit-build
-setuptools_scm
-sphinx<7.2
-sphinx-argparse
-sphinx-autoapi
-sphinx-copybutton
-sphinxcontrib-plantuml
-sphinxcontrib.datatemplates
-testpath
diff --git a/pyproject.toml b/pyproject.toml
index 8e469069052..15c446cd7cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,4 @@
 [build-system]
-
 requires = [
     "setuptools<64",
     "setuptools_scm[toml]>=6.2",
@@ -12,7 +11,148 @@ requires = [
     "pybind11>=2.10.0",  # If this comes out of sync with the version installed by Conan please update the version in CMakeLists
     "grpcio-tools",
 ]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "ert"
+authors = [
+  {name = "Equinor ASA", email = "fg_sib-scout@equinor.com"},
+]
+description = "Ensemble based Reservoir Tool (ERT)"
+requires-python = ">=3.8"
+readme = "README.md"
+license = {text = "GPL-3.0"}
+classifiers=[
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Other Environment",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
+    "Natural Language :: English",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Topic :: Scientific/Engineering",
+    "Topic :: Scientific/Engineering :: Physics",
+]
+dynamic = ["version"]
+dependencies=[
+    "aiofiles",
+    "aiohttp",
+    "alembic",
+    "ansicolors==1.1.8",
+    "async-generator",
+    "beartype > 0.11",
+    "cloudevents>=1.6.0",
+    "cloudpickle",
+    "tqdm>=4.62.0",
+    "cryptography",
+    "cwrap",
+    "dask_jobqueue",
+    "deprecation",
+    "dnspython >= 2",
+    "ecl >= 2.14.1",
+    "ert-storage >= 0.3.16",
+    "fastapi < 0.100.0",
+    "filelock",
+    "graphlib_backport; python_version < '3.9'",
+    "iterative_ensemble_smoother>=0.1.1",
+    "typing_extensions",
+    "jinja2",
+    "lark",
+    "matplotlib",
+    "numpy<2",
+    "packaging",
+    "pandas",
+    "pluggy>=1.3.0",
+    "protobuf",
+    "psutil",
+    "pydantic >= 1.10.8, < 2",
+    "PyQt5",
+    "pyrsistent",
+    "python-dateutil",
+    "pyyaml",
+    "qtpy",
+    "requests",
+    "scipy >= 1.10.1",
+    "sqlalchemy",
+    "uvicorn >= 0.17.0",
+    "websockets",
+    "httpx",
+    "tables",
+    "xarray",
+    "xtgeo >= 3.3.0",
+    "netCDF4",
+    "sortedcontainers"
+]
+
+[project.scripts]
+ert = "ert.__main__:main"
+"job_dispatch.py" = "_ert_job_runner.job_dispatch:main"
+
+[project.urls]
+Repository = "https://github.com/equinor/ert"
+
+[project.optional-dependencies]
+dev = [
+    "click",
+    "decorator",
+    "ecl_data_io",
+    "furo",
+    "flaky",
+    "grpcio-tools",
+    "hypothesis<=6.83.0; python_version=='3.8'",  # ipython pinned to 8.12.2 for python 3.8 support
+    "hypothesis; python_version>='3.9'",
+    "jsonpath_ng",
+    "jupytext",
+    "oil_reservoir_synthesizer",
+    "pytest-asyncio",
+    "pytest-benchmark",
+    "pytest-cov",
+    "pytest-memray",
+    "pytest-mock",
+    "pytest-mpl",
+    "pytest-qt",
+    "pytest-raises",
+    "pytest-snapshot",
+    "pytest-timeout",
+    "pytest-xdist",
+    "pytest>6",
+    "requests",
+    "scikit-build",
+    "setuptools_scm",
+    "sortedcontainers",
+    "sphinx<7.2",
+    "sphinx-argparse",
+    "sphinx-autoapi",
+    "sphinx-copybutton",
+    "sphinxcontrib-plantuml",
+    "sphinxcontrib.datatemplates",
+    "testpath",
+]
+style = [
+    "cmake-format",
+    "black",
+    "ruff",
+    "pylint",
+    "pylint-protobuf"
+]
+types = [
+    "mypy",
+    "mypy-protobuf<3.4",
+    "types-aiofiles",
+    "types-requests",
+    "types-PyYAML",
+    "types-python-dateutil",
+    "types-decorator",
+    "types-docutils",
+    "types-protobuf",
+    "types-tqdm",
+]
 
+[tool.setuptools]
+platforms = ["all"]
 
 [tool.pytest.ini_options]
 addopts = "-ra --strict-markers"
diff --git a/setup.py b/setup.py
index 3c6a59f2d6f..dead81499f4 100644
--- a/setup.py
+++ b/setup.py
@@ -74,18 +74,7 @@ def package_files(directory):
     return paths
 
 
-with open("README.md") as f:
-    long_description = f.read()
-
-
 args = dict(
-    name="ert",
-    author="Equinor ASA",
-    author_email="fg_sib-scout@equinor.com",
-    description="Ensemble based Reservoir Tool (ERT)",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/equinor/ert",
     packages=find_packages(where="src"),
     package_dir={"": "src"},
     package_data={
@@ -96,65 +85,6 @@ def package_files(directory):
             "job_queue/qstat_proxy.sh",
         ],
     },
-    include_package_data=True,
-    license="GPL-3.0",
-    platforms="any",
-    python_requires=">=3.8",
-    install_requires=[
-        "aiofiles",
-        "aiohttp",
-        "alembic",
-        "ansicolors==1.1.8",
-        "async-generator",
-        "beartype > 0.11",
-        "cloudevents>=1.6.0",
-        "cloudpickle",
-        "tqdm>=4.62.0",
-        "cryptography",
-        "cwrap",
-        "dask_jobqueue",
-        "deprecation",
-        "dnspython >= 2",
-        "ecl >= 2.14.1",
-        "ert-storage >= 0.3.16",
-        "fastapi < 0.100.0",
-        "filelock",
-        "graphlib_backport; python_version < '3.9'",
-        "iterative_ensemble_smoother>=0.1.1",
-        "typing_extensions",
-        "jinja2",
-        "lark",
-        "matplotlib",
-        "numpy<2",
-        "packaging",
-        "pandas",
-        "pluggy>=1.3.0",
-        "protobuf",
-        "psutil",
-        "pydantic >= 1.10.8, < 2",
-        "PyQt5",
-        "pyrsistent",
-        "python-dateutil",
-        "pyyaml",
-        "qtpy",
-        "requests",
-        "scipy >= 1.10.1",
-        "sortedcontainers",
-        "sqlalchemy",
-        "uvicorn >= 0.17.0",
-        "websockets",
-        "httpx",
-        "tables",
-        "xarray",
-        "xtgeo >= 3.3.0",
-        "netCDF4",
-    ],
-    entry_points={
-        "console_scripts": [
-            "ert=ert.__main__:main",
-            "job_dispatch.py = _ert_job_runner.job_dispatch:main",
-        ]
-    },
     cmake_args=[
         "-DBUILD_TESTS=OFF",
         # we can safely pass OSX_DEPLOYMENT_TARGET as it's ignored on
@@ -163,20 +93,6 @@ def package_files(directory):
         "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.15",
     ],
     cmake_source_dir="src/clib/",
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Environment :: Other Environment",
-        "Intended Audience :: Science/Research",
-        "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
-        "Natural Language :: English",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Topic :: Scientific/Engineering",
-        "Topic :: Scientific/Engineering :: Physics",
-    ],
     cmdclass={
         "egg_info": EggInfo,
         "compile_protocol_buffers": CompileProtocolBuffers,
diff --git a/src/ert/dark_storage/endpoints/responses.py b/src/ert/dark_storage/endpoints/responses.py
index ca417e5f9bf..96b8040eb96 100644
--- a/src/ert/dark_storage/endpoints/responses.py
+++ b/src/ert/dark_storage/endpoints/responses.py
@@ -19,7 +19,7 @@ async def get_ensemble_response_dataframe(
     res: LibresFacade = DEFAULT_LIBRESFACADE,
     db: StorageReader = DEFAULT_STORAGE,
     ensemble_id: UUID,
-    response_name: str
+    response_name: str,
 ) -> Response:
     dataframe = data_for_key(res, db.get_ensemble(ensemble_id), response_name)
     return Response(
diff --git a/style-requirements.txt b/style-requirements.txt
deleted file mode 100644
index 5d44a4eb8c9..00000000000
--- a/style-requirements.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-cmake-format
-black
-ruff
-pylint
-pylint-protobuf
diff --git a/types-requirements.txt b/types-requirements.txt
deleted file mode 100644
index 93fe095011e..00000000000
--- a/types-requirements.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-mypy
-mypy-protobuf<3.4
-types-aiofiles
-types-requests
-types-PyYAML
-types-python-dateutil
-types-decorator
-types-docutils
-types-protobuf
-types-tqdm