diff --git a/README.md b/README.md
index 0c86835..e67f5c0 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ projects using:
 
 ## Supported optional arguments:
 
-- `min_python` - Minimal version of python to be tested against, default is `"3.8"`. The maximum value is currently `"3.12"`
+- `min_python` - Minimal version of python to be tested against, default is `"3.8"`. The maximum value is currently `"3.13"`
 - `other_names`- A list of other tox environments to include in the matrix. We
   plan to read them from [envlist](https://tox.wiki/en/latest/config.html#envlist) field in `tox.ini`.
 - `platforms` - Default to `linux` only but can be `linux`, `windows`, `macos`
diff --git a/entrypoint.py b/entrypoint.py
index 7937c3e..8c57821 100755
--- a/entrypoint.py
+++ b/entrypoint.py
@@ -6,7 +6,7 @@
 
 from actions_toolkit import core
 
-KNOWN_PYTHONS = ("3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev")
+KNOWN_PYTHONS = ("3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13-dev")
 PLATFORM_MAP = {
     "linux": "ubuntu-22.04",
     "macos": "macos-13",
@@ -38,7 +38,7 @@ def main() -> None:
         core.debug(f"Testing strategy: {strategies}")
 
         result = []
-        if max_python == "3.12":
+        if max_python == "3.13":
             python_names = KNOWN_PYTHONS[KNOWN_PYTHONS.index(min_python) :]
         else:
             python_names = KNOWN_PYTHONS[