diff --git a/pyproject.toml b/pyproject.toml
index f4befb8..e7b7ed7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ home-page = "https://www.oziproject.dev"
 author = "Eden Ross Duff MSc"
 author-email = "help@oziproject.dev"
 license = "Unlicense"
+requires-python = '>=3.10, <3.14'
 download-url = "https://github.com/OZI-Project/ozi-spec/archive/refs/tags/{version}.tar.gz"
 project-urls = ["Documentation, https://docs.oziproject.dev/en/latest/ozi_spec.html"]
 keywords = "specification,standard,OZI,mesonbuild"
@@ -25,6 +26,7 @@ classifiers = [
     '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',
     'Intended Audience :: Other Audience',
     'Natural Language :: English',
@@ -201,6 +203,7 @@ ignore = [
     "RUF009",
     "RUF012",
     "RUF015",
+    "RUF200",
     "SIM",
     "T201",
     "TCH002",
@@ -312,15 +315,24 @@ commands =
 description = quickly fix minor source issues 
 deps = pipx
 skip_install = true
+commands_pre =
 commands =
-     pipx run --python {env_python} -q black -S .
-     pipx run --python {env_python} -q isort .
-     pipx run --python {env_python} -q autoflake -i -r .
-     pipx run --python {env_python} -q ruff check ozi_spec --fix
+     pipx run --python {env_python} black -S .
+     pipx run --python {env_python} isort .
+     pipx run --python {env_python} autoflake -i -r .
+     pipx run --python {env_python} ruff check . --fix
+commands_post =
 
 [testenv:scm]
 description = OZI supply chain management (setuptools_scm)
 deps = setuptools_scm[toml]>=8
 commands =
      {env_python} -m setuptools_scm {posargs}
+
+[testenv:invoke]
+description = OZI invoke task entrypoint, for more info use "tox -e invoke -- --list"
+no_package = true
+commands_post =
+     {env_python} -m invoke --search-root={env_tmp_dir}/subprojects/ozi/ozi {posargs}
+
 """