diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 9240a16f4..ff279e9fd 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-        - python-version: "3.12"
+        - python-version: "3.13"
           env:
             TOXENV: pylint
         - python-version: "3.9"
@@ -24,7 +24,7 @@ jobs:
         - python-version: "3.12"  # Keep in sync with .readthedocs.yml
           env:
             TOXENV: docs
-        - python-version: "3.12"
+        - python-version: "3.13"
           env:
             TOXENV: twinecheck
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 5ce48be61..2cd556516 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.12
+          python-version: "3.13"
       - run: | 
           pip install --upgrade build twine
           python -m build
diff --git a/.github/workflows/tests-macos.yml b/.github/workflows/tests-macos.yml
index 27ea0613d..9e78e26e3 100644
--- a/.github/workflows/tests-macos.yml
+++ b/.github/workflows/tests-macos.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/tests-ubuntu.yml b/.github/workflows/tests-ubuntu.yml
index 29c870e6a..b2a5681df 100644
--- a/.github/workflows/tests-ubuntu.yml
+++ b/.github/workflows/tests-ubuntu.yml
@@ -24,7 +24,10 @@ jobs:
         - python-version: "3.12"
           env:
             TOXENV: py
-        - python-version: "3.12"
+        - python-version: "3.13"
+          env:
+            TOXENV: py
+        - python-version: "3.13"
           env:
             TOXENV: asyncio
         - python-version: pypy3.9
@@ -51,10 +54,10 @@ jobs:
           env:
             TOXENV: botocore-pinned
 
-        - python-version: "3.12"
+        - python-version: "3.13"
           env:
             TOXENV: extra-deps
-        - python-version: "3.12"
+        - python-version: "3.13"
           env:
             TOXENV: botocore
 
diff --git a/.github/workflows/tests-windows.yml b/.github/workflows/tests-windows.yml
index 5728c6fd0..67a32aac6 100644
--- a/.github/workflows/tests-windows.yml
+++ b/.github/workflows/tests-windows.yml
@@ -24,7 +24,10 @@ jobs:
         - python-version: "3.12"
           env:
             TOXENV: py
-        - python-version: "3.12"
+        - python-version: "3.13"
+          env:
+            TOXENV: py
+        - python-version: "3.13"
           env:
             TOXENV: asyncio
 
diff --git a/setup.py b/setup.py
index ec9ac6597..6cc1150a5 100644
--- a/setup.py
+++ b/setup.py
@@ -62,6 +62,7 @@ setup(
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Internet :: WWW/HTTP",
diff --git a/tests/test_utils_python.py b/tests/test_utils_python.py
index 4c60deafe..5681ff9a4 100644
--- a/tests/test_utils_python.py
+++ b/tests/test_utils_python.py
@@ -1,6 +1,7 @@
 import functools
 import operator
 import platform
+import sys
 
 from twisted.trial import unittest
 
@@ -238,16 +239,18 @@ class UtilsPythonTestCase(unittest.TestCase):
         self.assertEqual(get_func_args(str.split, stripself=True), ["sep", "maxsplit"])
         self.assertEqual(get_func_args(" ".join, stripself=True), ["iterable"])
 
-        if platform.python_implementation() == "CPython":
-            # This didn't work on older versions of CPython: https://github.com/python/cpython/issues/86951
+        if sys.version_info >= (3, 13) or platform.python_implementation() == "PyPy":
+            # the correct and correctly extracted signature
+            self.assertEqual(
+                get_func_args(operator.itemgetter(2), stripself=True), ["obj"]
+            )
+        elif platform.python_implementation() == "CPython":
+            # ["args", "kwargs"] is a correct result for the pre-3.13 incorrect function signature
+            # [] is an incorrect result on even older CPython (https://github.com/python/cpython/issues/86951)
             self.assertIn(
                 get_func_args(operator.itemgetter(2), stripself=True),
                 [[], ["args", "kwargs"]],
             )
-        elif platform.python_implementation() == "PyPy":
-            self.assertEqual(
-                get_func_args(operator.itemgetter(2), stripself=True), ["obj"]
-            )
 
     def test_without_none_values(self):
         self.assertEqual(without_none_values([1, None, 3, 4]), [1, 3, 4])
diff --git a/tox.ini b/tox.ini
index fbbce48d4..a526fc120 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,7 @@ minversion = 1.7.0
 deps =
     attrs
     pexpect >= 4.8.0
-    pyftpdlib >= 1.5.8
+    pyftpdlib >= 2.0.1
     pygments
     pytest
     pytest-cov==4.0.0