diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 168ed583..dca30509 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -7,12 +7,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Python 3.9
-        uses: actions/setup-python@v1
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: "3.10"
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fedc0ca0..61df37ea 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,8 +15,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "pypy3.9", "3.12"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "pypy3.11"]
         flask: ["<3.0.0", ">=3.0.0"]
+        exclude:
+          - python-version: "3.13"
+            flask: "<3.0.0"
+          - python-version: "3.14"
+            flask: "<3.0.0"
     steps:
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -28,6 +33,11 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
+          # PyPy: pin rpds-py before resolving jsonschema/referencing so pip picks manylinux wheels
+          # (sdists use maturin; builds are fragile on PyPy). CPython does not need this.
+          case "${{ matrix.python-version }}" in
+            pypy3.11) pip install 'rpds-py<0.30' 'readme-renderer>=35,<42' ;;
+          esac
           pip install "flask${{ matrix.flask }}"
           pip install ".[test]"
       - name: Test with inv
@@ -41,10 +51,10 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'pull_request'
     steps:
-      - name: Set up Python 3.9
+      - name: Set up Python 3.12
         uses: actions/setup-python@v4
         with:
-          python-version: "3.9"
+          python-version: "3.12"
       - name: Checkout ${{ github.base_ref }}
         uses: actions/checkout@v3
         with:
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7e36709d..ea0152da 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -25,6 +25,28 @@ Releases prior to 0.3.0 were “best effort” filled out, but are missing
 some info. If you see your contribution missing info, please open a PR
 on the Changelog!
 
+.. _section-1.3.3:
+1.3.3
+-----
+.. _enhancements-1.3.3
+Enhancements
+~~~~~~~~~~~~
+
+::
+
+   * Drop support for Python 3.9 (EOL); require Python 3.10 or newer. [python-restx]
+   * Declare and test support for Python 3.13 and 3.14 (CPython). [python-restx]
+   * Expand GitHub Actions and tox coverage: PyPy 3.11 with both Flask 2.x and Flask 3.x; exclude Flask 2 on 3.13/3.14 where unsupported. [python-restx]
+   * Refresh test and release tooling (pytest, pytest-benchmark, pytest-profiling, twine) for newer interpreters. GitHub Actions pre-installs compatible ``rpds-py`` (and ``readme-renderer`` for PyPy 3.11) for PyPy jobs; tox pins ``rpds-py`` for local PyPy envs. [python-restx]
+
+.. _bug_fixes-1.3.3
+Bug Fixes
+~~~~~~~~~
+
+::
+
+   * Adjust field tests for Python 3.14 (``staticmethod`` around ``functools.partial`` used as a class attribute). [python-restx]
+
 .. _section-1.3.1:
 1.3.1
 -----
diff --git a/README.rst b/README.rst
index 39bbac5f..0a68b497 100644
--- a/README.rst
+++ b/README.rst
@@ -38,7 +38,7 @@ and expose its documentation properly using `Swagger`_.
 Compatibility
 =============
 
-Flask-RESTX requires Python 3.9+.
+Flask-RESTX requires Python 3.10+.
 
 On Flask Compatibility
 ======================
diff --git a/bumpr.rc b/bumpr.rc
index 337c662b..3b025ee4 100644
--- a/bumpr.rc
+++ b/bumpr.rc
@@ -4,7 +4,7 @@ vcs = git
 commit = true
 tag = true
 push = true
-tests = tox -e py39
+tests = tox -e py310
 clean =
     inv clean
 files =
diff --git a/doc/index.rst b/doc/index.rst
index cacdb53b..649aadc9 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -33,7 +33,7 @@ development and to support our users.
 Compatibility
 =============
 
-Flask-RESTX requires Python 3.9+.
+Flask-RESTX requires Python 3.10+.
 
 
 Installation
diff --git a/doc/installation.rst b/doc/installation.rst
index c4c34604..9934494d 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -20,5 +20,5 @@ The development version can be downloaded from
     pip install -e .[dev,test]
 
 
-Flask-RESTX requires Python version 3.9+.
+Flask-RESTX requires Python version 3.10+.
 It's also working with PyPy and PyPy3.
diff --git a/flask_restx/fields.py b/flask_restx/fields.py
index 4484ef51..9bbb9c79 100644
--- a/flask_restx/fields.py
+++ b/flask_restx/fields.py
@@ -22,7 +22,6 @@
 from .marshalling import marshal
 from .utils import camel_to_dash, not_none
 
-
 __all__ = (
     "Raw",
     "String",
@@ -880,10 +879,10 @@ def output(self, key, obj, ordered=False):
                     # complexity to O(n)
                     if ordered:
                         # Get first element if respecting order
-                        (objkey, val) = self._flat.pop(0)
+                        objkey, val = self._flat.pop(0)
                     else:
                         # Previous default retained
-                        (objkey, val) = self._flat.pop()
+                        objkey, val = self._flat.pop()
                     if (
                         objkey not in self._cache
                         and objkey not in self.exclude
diff --git a/flask_restx/model.py b/flask_restx/model.py
index b72496cf..f8bcd87e 100644
--- a/flask_restx/model.py
+++ b/flask_restx/model.py
@@ -17,7 +17,6 @@
 from .utils import not_none
 from ._http import HTTPStatus
 
-
 RE_REQUIRED = re.compile(r"u?\'(?P<name>.*)\' is a required property", re.I | re.U)
 
 
diff --git a/flask_restx/utils.py b/flask_restx/utils.py
index 409657aa..16a194fd 100644
--- a/flask_restx/utils.py
+++ b/flask_restx/utils.py
@@ -7,7 +7,6 @@
 
 from ._http import HTTPStatus
 
-
 FIRST_CAP_RE = re.compile("(.)([A-Z][a-z]+)")
 ALL_CAP_RE = re.compile("([a-z0-9])([A-Z])")
 
diff --git a/requirements/test.pip b/requirements/test.pip
index 6ce09332..9d709f71 100644
--- a/requirements/test.pip
+++ b/requirements/test.pip
@@ -1,13 +1,12 @@
 blinker
 Faker==2.0.0
 mock==3.0.5
-pytest==7.0.1
-pytest-benchmark==3.4.1
+pytest==8.4.2
+pytest-benchmark==5.2.3
 pytest-cov==4.0.0
 pytest-flask==1.3.0
 pytest-mock==3.6.1
-pytest-profiling==1.7.0
+pytest-profiling==1.8.1
 invoke==2.2.0
-twine==3.8.0
+twine==6.2.0
 setuptools
-backports.zoneinfo;python_version<"3.9"
diff --git a/setup.py b/setup.py
index eed17d83..335c55f7 100644
--- a/setup.py
+++ b/setup.py
@@ -102,13 +102,14 @@ def pip(filename):
         "Topic :: System :: Software Distribution",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "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 :: 3.14",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "License :: OSI Approved :: BSD License",
     ],
-    python_requires=">=3.9",
+    python_requires=">=3.10",
 )
diff --git a/tests/test_fields.py b/tests/test_fields.py
index 9f255c5c..b57f83c6 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -693,7 +693,7 @@ def test_unsupported_value_format(self):
 
 
 class FormatedStringFieldTest(StringTestMixin, BaseFieldTestMixin, FieldTestCase):
-    field_class = partial(fields.FormattedString, "Hello {name}")
+    field_class = staticmethod(partial(fields.FormattedString, "Hello {name}"))
 
     def test_defaults(self):
         field = fields.FormattedString("Hello {name}")
@@ -731,7 +731,7 @@ def test_tuple(self):
 
 
 class UrlFieldTest(StringTestMixin, BaseFieldTestMixin, FieldTestCase):
-    field_class = partial(fields.Url, "endpoint")
+    field_class = staticmethod(partial(fields.Url, "endpoint"))
 
     def test_defaults(self):
         field = fields.Url("endpoint")
@@ -931,7 +931,7 @@ def test_as_list_is_reusable(self, api):
 
 
 class ListFieldTest(BaseFieldTestMixin, FieldTestCase):
-    field_class = partial(fields.List, fields.String)
+    field_class = staticmethod(partial(fields.List, fields.String))
 
     def test_defaults(self):
         field = fields.List(fields.String)
@@ -1025,7 +1025,7 @@ def test_list_of_raw(self):
 
 
 class WildcardFieldTest(BaseFieldTestMixin, FieldTestCase):
-    field_class = partial(fields.Wildcard, fields.String)
+    field_class = staticmethod(partial(fields.Wildcard, fields.String))
 
     def test_types(self):
         with pytest.raises(fields.MarshallingError):
diff --git a/tests/test_postman.py b/tests/test_postman.py
index 0317bf64..85c91628 100644
--- a/tests/test_postman.py
+++ b/tests/test_postman.py
@@ -9,7 +9,6 @@
 
 from urllib.parse import parse_qs, urlparse
 
-
 with open(join(dirname(__file__), "postman-v1.schema.json")) as f:
     schema = json.load(f)
 
diff --git a/tests/test_swagger.py b/tests/test_swagger.py
index 8f181505..c4a5ca7b 100644
--- a/tests/test_swagger.py
+++ b/tests/test_swagger.py
@@ -1451,23 +1451,17 @@ def get(self):
 
         description = lambda m: data["paths"]["/description/"][m]["description"]  # noqa
 
-        assert description("get") == dedent(
-            """\
+        assert description("get") == dedent("""\
             Parent description.
-            Some details"""
-        )
+            Some details""")
 
-        assert description("post") == dedent(
-            """\
+        assert description("post") == dedent("""\
             Parent description.
-            Extra description"""
-        )
+            Extra description""")
 
-        assert description("delete") == dedent(
-            """\
+        assert description("delete") == dedent("""\
             Parent description.
-            A delete operation"""
-        )
+            A delete operation""")
 
         assert description("put") == "Parent description."
         assert "description" not in data["paths"]["/descriptionless/"]["get"]
diff --git a/tox.ini b/tox.ini
index 3ac33e79..f28dd779 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,9 +5,10 @@
 
 [tox]
 envlist =
-    py{39, 310, 311}-flask2,
-    py{311, 312}-flask3
-    pypy3.9
+    py{310, 311, 312}-flask2,
+    py{311, 312, 313, 314}-flask3
+    pypy3.11-flask2
+    pypy3.11-flask3
     doc
 
 [testenv]
@@ -18,6 +19,12 @@ deps =
     -r{toxinidir}/requirements/test.pip
     -r{toxinidir}/requirements/develop.pip
 
+[testenv:pypy3.11-flask{2,3}]
+deps =
+    {[testenv]deps}
+    rpds-py<0.30
+commands = {posargs:inv test}
+
 [testenv:doc]
 changedir = doc
 deps = .[doc]