diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index db87b9f..c6a598d 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -28,7 +28,7 @@ jobs:
     steps:
       - name: Determine matrix
         id: generate_matrix
-        uses: coactions/matrix@main
+        uses: ./
         with:
           min_python: "3.10"
           max_python: "3.13"
diff --git a/README.md b/README.md
index 240ba51..b979f7f 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 `"3.13"`
+- `min_python` - Minimal version of python to be tested against, default is `"3.8"`. The maximum value is currently `"3.14"`
 - `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/action.yml b/action.yml
index f941be3..09878b6 100644
--- a/action.yml
+++ b/action.yml
@@ -12,7 +12,7 @@ inputs:
   max_python:
     description: Maximal version of python to be tested against.
     required: false
-    default: "3.12"
+    default: "3.13"
   default_python:
     description: Default version of python used by env.
     required: false
diff --git a/entrypoint.py b/entrypoint.py
index 82aeebc..ea756ed 100755
--- a/entrypoint.py
+++ b/entrypoint.py
@@ -9,9 +9,9 @@
 
 from actions_toolkit import core
 
-KNOWN_PYTHONS = ("3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13-dev")
+KNOWN_PYTHONS = ("3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14-dev")
 PYTHON_REDIRECTS = {
-    "3.13": "3.13-dev",  # Remove once GHA allows 3.13 as a valid version
+    "3.14": "3.14-dev",  # Remove once GHA allows 3.14 as a valid version
 }
 PLATFORM_MAP = {
     "linux": "ubuntu-24.04",
@@ -104,7 +104,7 @@ def main() -> None:  # noqa: C901,PLR0912,PLR0915
         core.debug(f"Testing strategy: {strategies}")
 
         result: dict[str, dict[str, str]] = {}
-        if max_python == "3.13":
+        if max_python == "3.14":
             python_names = KNOWN_PYTHONS[KNOWN_PYTHONS.index(min_python) :]
         else:
             python_names = KNOWN_PYTHONS[
@@ -144,7 +144,7 @@ def sort_key(s: str) -> tuple[int, str]:
                 "os": PLATFORM_MAP[platform_name],
             }
             for index, command in enumerate(commands[1:]):
-                data[f"command{index+2}"] = command
+                data[f"command{index + 2}"] = command
             add_job(
                 result,
                 name,