diff --git a/README.rst b/README.rst
index 016e810..5ec24c4 100644
--- a/README.rst
+++ b/README.rst
@@ -54,7 +54,7 @@ Use **pip**:
 
     python -m pip install time-machine
 
-Python 3.8 to 3.12 supported.
+Python 3.8 to 3.13 supported.
 Only CPython is supported at this time because time-machine directly hooks into the C-level API.
 
 
diff --git a/pyproject.toml b/pyproject.toml
index fb63224..a8b2b95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Typing :: Typed",
 ]
 dependencies = [