diff --git a/.github/workflows/python-nightly.yml b/.github/workflows/python-nightly.yml
index 2f9ae2a18..c4bffd278 100644
--- a/.github/workflows/python-nightly.yml
+++ b/.github/workflows/python-nightly.yml
@@ -49,6 +49,7 @@ jobs:
           # https://launchpad.net/~deadsnakes/+archive/ubuntu/nightly/+packages
           - "3.11-dev"
           - "3.12-dev"
+          - "3.13-dev"
           # https://github.com/actions/setup-python#available-versions-of-pypy
           - "pypy-3.8-nightly"
           - "pypy-3.9-nightly"
diff --git a/setup.py b/setup.py
index ab75d2c65..da105fcd9 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@
 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 :: Software Development :: Quality Assurance
diff --git a/tox.ini b/tox.ini
index d9540e51b..b756e175c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 [tox]
 # When changing this list, be sure to check the [gh] list below.
 # PYVERSIONS
-envlist = py3{8,9,10,11,12}, pypy3, doc, lint, mypy
+envlist = py3{8,9,10,11,12,13}, pypy3, doc, lint, mypy
 skip_missing_interpreters = {env:COVERAGE_SKIP_MISSING_INTERPRETERS:True}
 toxworkdir = {env:TOXWORKDIR:.tox}
 
@@ -43,7 +43,7 @@ commands =
     python -m pip install {env:COVERAGE_PIP_ARGS} -q -e .
     python igor.py test_with_core ctrace {posargs}
 
-    py3{12}: python igor.py test_with_core sysmon {posargs}
+    py3{12,13},anypy: python igor.py test_with_core sysmon {posargs}
 
     # Remove the C extension so that we can test the PyTracer
     python igor.py remove_extension
@@ -124,4 +124,5 @@ python =
     3.10 = py310
     3.11 = py311
     3.12 = py312
+    3.13 = py313
     pypy-3 = pypy3