diff --git a/setup.cfg b/.bumpversion.cfg
similarity index 61%
rename from setup.cfg
rename to .bumpversion.cfg
index 00647d16..17962fe2 100644
--- a/setup.cfg
+++ b/.bumpversion.cfg
@@ -4,14 +4,7 @@ commit = True
 tag = True
 tag_name = {new_version}
 
-[flake8]
-max-line-length = 120
-builtins = json
-statistics = true
-ignore = E202
-exclude = ./data,./src,.svn,CVS,.bzr,.hg,.git,__pycache__
-
-[bumpversion:file:setup.py]
+[bumpversion:file:pyproject.toml]
 
 [bumpversion:file:README.md]
 
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 345ee9f6..b8b8ad09 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -8,11 +8,12 @@ on:
 
 jobs:
   build:
-
+    env:
+      DEFAULT_PYTHON: 3.12
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         architecture: ["x64"]
     steps:
     - uses: actions/checkout@v2
@@ -21,59 +22,36 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         architecture: ${{ matrix.architecture }}
-    - name: Cache pip 3.8
-      if: matrix.python-version == 3.8
-      uses: actions/cache@v4
-      with:
-        # This path is specific to Ubuntu
-        path: ~/.cache/pip
-        # Look to see if there is a cache hit for the corresponding requirements file
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev3.8.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
-          ${{ runner.os }}-
     - name: Cache pip
-      if: matrix.python-version != 3.8
       env:
         PYO3_USE_ABI3_FORWARD_COMPATIBILITY: "1"
       uses: actions/cache@v4
       with:
-        # This path is specific to Ubuntu
-        path: ~/.cache/pip
-        # Look to see if there is a cache hit for the corresponding requirements file
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
         restore-keys: |
-          ${{ runner.os }}-pip-
           ${{ runner.os }}-
     - name: Upgrade setuptools
       if: matrix.python-version >= 3.12
       run: |
         # workaround for 3.12, SEE: https://github.com/pypa/setuptools/issues/3661#issuecomment-1813845177
         pip install --upgrade setuptools
-    - name: Install dependencies
-      if: matrix.python-version > 3.9
-      run: pip install -r requirements-dev.txt
-    - name: Install dependencies
-      if: matrix.python-version <= 3.9
-      run: pip install -r requirements-dev3.8.txt
     - name: Lint with flake8
-      if: matrix.python-version == 3.12
+      if: matrix.python-version == ${{ env.DEFAULT_PYTHON }}
       run: |
         # stop the build if there are Python syntax errors or undefined names
-        flake8 deepdiff --count --select=E9,F63,F7,F82 --show-source --statistics
+        nox -e flake8 -- deepdiff --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 deepdiff --count --exit-zero --max-complexity=26 --max-line-lengt=250 --statistics
+        nox -e flake8 -- deepdiff --count --exit-zero --max-complexity=26 --max-line-length=250 --statistics
     - name: Test with pytest and get the coverage
-      if: matrix.python-version == 3.12
+      if: matrix.python-version == ${{ env.DEFAULT_PYTHON }}
       run: |
-        pytest --benchmark-disable --cov-report=xml --cov=deepdiff tests/ --runslow
+        nox -e pytest -s -- --benchmark-disable --cov-report=xml --cov=deepdiff tests/ --runslow
     - name: Test with pytest and no coverage report
-      if: matrix.python-version != 3.12
+      if: matrix.python-version != ${{ env.DEFAULT_PYTHON }}
       run: |
-        pytest --benchmark-disable
+        nox -e pytest -s -- --benchmark-disable tests/
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4
-      if: matrix.python-version == 3.12
+      if: matrix.python-version == ${{ env.DEFAULT_PYTHON }}
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
       with:
diff --git a/README.md b/README.md
index b1352435..3c2ff681 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@
 - [Extract](https://zepworks.com/deepdiff/current/extract.html): Extract an item from a nested Python object using its path.
 - [commandline](https://zepworks.com/deepdiff/current/commandline.html): Use DeepDiff from commandline.
 
-Tested on Python 3.8+ and PyPy3.
+Tested on Python 3.9+ and PyPy3.
 
 - **[Documentation](https://zepworks.com/deepdiff/8.4.2/)**
 
diff --git a/deepdiff/base.py b/deepdiff/base.py
index d3b24fb8..d16bad50 100644
--- a/deepdiff/base.py
+++ b/deepdiff/base.py
@@ -1,4 +1,3 @@
-from typing import Any
 from deepdiff.helper import strings, numbers, SetOrdered
 
 
diff --git a/deepdiff/serialization.py b/deepdiff/serialization.py
index c148aadf..a9e2d68a 100644
--- a/deepdiff/serialization.py
+++ b/deepdiff/serialization.py
@@ -32,7 +32,6 @@
     pydantic_base_model_type,
     PydanticBaseModel,
     NotPresent,
-    ipranges,
 )
 from deepdiff.model import DeltaResult
 
diff --git a/noxfile.py b/noxfile.py
new file mode 100644
index 00000000..f112fe13
--- /dev/null
+++ b/noxfile.py
@@ -0,0 +1,49 @@
+"""nox configuration file."""
+
+# ruff: noqa: ANN001, D401
+
+import nox
+
+
+@nox.session
+def flake8(session) -> None:
+    """Run flake8."""
+    posargs = session.posargs if session.posargs else ["deepdiff"]
+    session.install(".[cli,dev,static]")
+    session.run(
+        "python",
+        "-m",
+        "flake8",
+        *posargs,
+    )
+
+
+@nox.session
+def mypy(session) -> None:
+    """Run mypy."""
+    posargs = session.posargs if session.posargs else ["deepdiff"]
+    session.install(".[cli,dev,static]")
+    session.run(
+        "python",
+        "-m",
+        "mypy",
+        "--install-types",
+        "--non-interactive",
+        *posargs,
+    )
+
+
+@nox.session(python=["3.9", "3.10", "3.11", "3.12", "3.13"])
+def pytest(session) -> None:
+    """Test with pytest."""
+    posargs = session.posargs if session.posargs else ["-vv", "tests"]
+    session.install(".[cli,dev,static,test]")
+    session.run(
+        "python",
+        "-m",
+        "pytest",
+        "--cov=deepdiff",
+        "--cov-report",
+        "term-missing",
+        *posargs,
+    )
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..1511930b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,104 @@
+[build-system]
+requires = ["flit_core >=3.11,<4"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "deepdiff"
+version = "8.4.2"
+dependencies = [
+  "orderly-set>=5.3.0,<6",
+]
+requires-python = ">=3.9"
+authors = [
+  { name = "Seperman", email = "sep@zepworks.com" }
+]
+maintainers = [
+  { name = "Seperman", email = "sep@zepworks.com" }
+]
+description = "Deep Difference and Search of any Python object/data. Recreate objects by adding adding deltas to each other."
+readme = "README.md"
+license = {file = "LICENSE"}
+keywords = []
+classifiers = [
+  "Intended Audience :: Developers",
+  "Operating System :: OS Independent",
+  "Topic :: Software Development",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: Implementation :: PyPy",
+  "Development Status :: 5 - Production/Stable",
+  "License :: OSI Approved :: MIT License"
+]
+
+# `dependency-groups` would make this a lot cleaner, in theory.
+[project.optional-dependencies]
+coverage = [
+  "coverage~=7.6.0"
+]
+cli = [
+  "click~=8.1.0",
+  "pyyaml~=6.0.0"
+]
+dev = [
+  "bump2version~=1.0.0",
+  "jsonpickle~=4.0.0",
+  "ipdb~=0.13.0",
+  "numpy~=2.2.0; python_version >= '3.10'",
+  "numpy~=2.0; python_version < '3.10'",
+  "python-dateutil~=2.9.0",
+  "orjson~=3.10.0",
+  "tomli~=2.2.0",
+  "tomli-w~=1.2.0",
+  "pandas~=2.2.0",
+  "polars~=1.21.0",
+]
+docs = [
+  # We use the html style that is not supported in Sphinx 7 anymore.
+  "Sphinx~=6.2.0",
+  "sphinx-sitemap~=2.6.0",
+  "sphinxemoji~=0.3.0"
+]
+static = [
+  "flake8~=7.1.0",
+  "flake8-pyproject~=1.2.3",
+  "pydantic~=2.10.0",
+  "types-setuptools~=75.8.0",
+]
+test = [
+  "pytest~=8.3.0",
+  "pytest-benchmark~=5.1.0",
+  "pytest-cov~=6.0.0",
+  "python-dotenv~=1.0.0",
+]
+
+[project.scripts]
+deep = "deepdiff.commands:cli"
+
+[project.urls]
+Homepage = "https://zepworks.com/deepdiff/"
+Documentation = "https://zepworks.com/deepdiff/"
+Repository = "https://github.com/seperman/deepdiff"
+Issues = "https://github.com/seperman/deepdiff/issues"
+
+[tool.coverage.run]
+branch = true
+source = ["."]
+
+[tool.flake8]
+max-line-length = 120
+builtins = "json"
+statistics = true
+ignore = "E202"
+exclude = "./data,./src,.svn,CVS,.bzr,.hg,.git,__pycache__"
+
+[tool.pytest.ini_options]
+addopts = "--pdbcls=IPython.terminal.debugger:Pdb"
+
+[tool.setuptools]
+packages = ["deepdiff"]
+
+[tool.setuptools.package-metadata]
+deepdiff = ["py.typed"]
diff --git a/pytest.ini b/pytest.ini
deleted file mode 100644
index 8509e73b..00000000
--- a/pytest.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[pytest]
-addopts = --pdbcls=IPython.terminal.debugger:Pdb
diff --git a/requirements-cli.txt b/requirements-cli.txt
deleted file mode 100644
index 3ed63615..00000000
--- a/requirements-cli.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-click==8.1.8
-pyyaml==6.0.2
diff --git a/requirements-dev.txt b/requirements-dev.txt
deleted file mode 100644
index a0a5ea26..00000000
--- a/requirements-dev.txt
+++ /dev/null
@@ -1,22 +0,0 @@
--r requirements.txt
--r requirements-cli.txt
-bump2version==1.0.1
-jsonpickle==4.0.1
-coverage==7.6.10
-ipdb==0.13.13
-numpy==2.2.2
-pytest==8.3.4
-pytest-cov==6.0.0
-python-dotenv==1.0.1
-flake8==7.1.1
-python-dateutil==2.9.0.post0
-orjson==3.10.15
-wheel==0.45.1
-tomli==2.2.1
-tomli-w==1.2.0
-pydantic==2.10.6
-pytest-benchmark==5.1.0
-pandas==2.2.3
-polars==1.21.0
-setuptools==75.8.0
-types-setuptools==75.8.0
diff --git a/requirements-dev3.8.txt b/requirements-dev3.8.txt
deleted file mode 100644
index b4f84058..00000000
--- a/requirements-dev3.8.txt
+++ /dev/null
@@ -1,20 +0,0 @@
--r requirements.txt
--r requirements-cli.txt
-bump2version==1.0.1
-jsonpickle==3.2.1
-coverage==7.5.3
-ipdb==0.13.13
-numpy>=1.24.4,<2.0.0
-pytest==8.2.2
-pytest-cov==5.0.0
-python-dotenv==1.0.1
-flake8==7.1.0
-python-dateutil==2.9.0.post0
-orjson==3.10.12
-wheel==0.43.0
-tomli==2.0.1
-tomli-w==1.0.0
-pydantic==2.7.4
-pytest-benchmark==4.0.0
-pandas==2.0.3
-polars==1.0.0
diff --git a/requirements-docs.txt b/requirements-docs.txt
deleted file mode 100644
index 9a036843..00000000
--- a/requirements-docs.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-Sphinx==6.2.1 # We use the html style that is not supported in Sphinx 7 anymore.
-sphinx-sitemap==2.6.0
-sphinxemoji==0.3.1
diff --git a/requirements-optimize.txt b/requirements-optimize.txt
deleted file mode 100644
index b3fe036f..00000000
--- a/requirements-optimize.txt
+++ /dev/null
@@ -1 +0,0 @@
-orjson
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 7fc4bb42..00000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-orderly-set>=5.3.0,<6
diff --git a/run_tests.sh b/run_tests.sh
deleted file mode 100755
index 660146f5..00000000
--- a/run_tests.sh
+++ /dev/null
@@ -1 +0,0 @@
-pytest --cov=deepdiff --cov-report term-missing
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 04cae3fd..00000000
--- a/setup.py
+++ /dev/null
@@ -1,69 +0,0 @@
-import os
-import sys
-from setuptools import setup
-
-if sys.version_info.major == 2:  # pragma: no cover
-    sys.exit('Python 2 is not supported anymore. The last version of DeepDiff that supported Py2 was 3.3.0')
-
-# if you are not using vagrant, just delete os.link directly,
-# The hard link only saves a little disk space, so you should not care
-if os.environ.get('USER', '') == 'vagrant':
-    del os.link
-
-version = '8.4.2'
-
-
-def get_reqs(filename):
-    with open(filename, "r") as reqs_file:
-        reqs = reqs_file.readlines()
-    return reqs
-
-
-reqs = get_reqs("requirements.txt")
-cli_reqs = get_reqs("requirements-cli.txt")
-optimize_reqs = get_reqs("requirements-optimize.txt")
-
-with open('README.md') as file:
-    long_description = file.read()
-
-
-setup(name='deepdiff',
-      version=version,
-      description='Deep Difference and Search of any Python object/data. Recreate objects by adding adding deltas to each other.',
-      url='https://github.com/seperman/deepdiff',
-      download_url='https://github.com/seperman/deepdiff/tarball/master',
-      author='Seperman',
-      author_email='sep@zepworks.com',
-      license='MIT',
-      packages=['deepdiff'],
-      package_data={"deepdiff": ["py.typed"]},
-      zip_safe=True,
-      include_package_data=True,
-      long_description=long_description,
-      long_description_content_type='text/markdown',
-      install_requires=reqs,
-      python_requires='>=3.8',
-      extras_require={
-          "cli": cli_reqs,
-          "optimize": optimize_reqs,
-      },
-      classifiers=[
-          "Intended Audience :: Developers",
-          "Operating System :: OS Independent",
-          "Topic :: Software Development",
-          "Programming Language :: Python :: 3.8",
-          "Programming Language :: Python :: 3.9",
-          "Programming Language :: Python :: 3.10",
-          "Programming Language :: Python :: 3.11",
-          "Programming Language :: Python :: 3.12",
-          "Programming Language :: Python :: 3.13",
-          "Programming Language :: Python :: Implementation :: PyPy",
-          "Development Status :: 5 - Production/Stable",
-          "License :: OSI Approved :: MIT License"
-      ],
-      entry_points={
-          'console_scripts': [
-              'deep=deepdiff.commands:cli',
-          ],
-      },
-      )
diff --git a/tests/test_serialization.py b/tests/test_serialization.py
index 3c506834..6f16cdca 100644
--- a/tests/test_serialization.py
+++ b/tests/test_serialization.py
@@ -393,9 +393,6 @@ def prefix_callback(**kwargs):
         (9, np.array([[ 101, 3533, 1998, 4532, 2024, 3415, 1012,  102]]), np.array)
     ])
     def test_json_dumps_and_loads(self, test_num, value, func_to_convert_back):
-        if test_num == 8 and py_current_version < 3.8:
-            print(f"Skipping test_json_dumps_and_loads #{test_num} on Python {py_current_version}")
-            return
         serialized = json_dumps(value)
         back = json_loads(serialized)
         if func_to_convert_back: