diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 57b62ee..b366183 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,11 +13,11 @@ repos:
     -   id: check-added-large-files
         args: [--maxkb=5120]  # 2 MB
 -   repo: https://github.com/psf/black
-    rev: 21.12b0
+    rev: 22.10.0
     hooks:
     -   id: black
         name: Formatting
-        args: ["./oxo"]
+        args: ["./oxo.py"]
 -   repo: https://github.com/pycqa/isort
     rev: 5.10.1
     hooks:
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5170cdd
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,15 @@
+SHELL := /bin/bash
+.PHONY: all venv
+
+VENV_DIR=$$(pwd)/venv
+VENV_PYTHON=$(VENV_DIR)/bin/python
+VENV_BIN=$(VENV_DIR)/bin
+
+venv:
+	@echo making venv at $(VENV_DIR)
+	@python -m venv $(VENV_DIR)
+	@$(VENV_PYTHON) -m pip install --upgrade pip
+
+install: venv
+	@$(VENV_PYTHON) -m pip install --upgrade -e '.[dev]'
+	@$(VENV_PYTHON) -m pre_commit install
diff --git a/oxo/cli.py b/oxo.py
similarity index 55%
rename from oxo/cli.py
rename to oxo.py
index 2f07802..2435a58 100644
--- a/oxo/cli.py
+++ b/oxo.py
@@ -1,15 +1,47 @@
+import io
 import typing as t
 from pathlib import Path
 
+import httpx
 import typer
 
-from oxo import __version__, api
+try:
+    from importlib.metadata import version
+except ImportError:
+    from importlib_metadata import version
+
+__version__ = version("oxo")
 
 app = typer.Typer()
 
 BASE_URL = typer.Option("https://0x0.st", envvar="OXO_BASE_URL")
 
 
+def post_to(base_url: str, *, data: t.Iterable[t.Dict]) -> str:
+    retval = []
+    with httpx.Client() as client:
+        for d in data:
+            if isinstance(d.get("file"), io.BufferedReader):
+                res = client.post(base_url, files=d)
+            else:
+                res = client.post(base_url, data=d)
+            res.raise_for_status()
+            retval.append(res.text.strip())
+    return " ".join(retval)
+
+
+def post_files(base_url, files: t.List[Path]):
+    return post_to(base_url, data=({"file": f.open("rb")} for f in files))
+
+
+def post_repost(base_url, urls: t.List[str]):
+    return post_to(base_url, data=({"url": u.strip()} for u in urls))
+
+
+def post_shorten(base_url, urls: t.List[str]):
+    return post_to(base_url, data=({"shorten": u.strip()} for u in urls))
+
+
 def version_callback(value: bool):
     if value:
         typer.echo(f"{__version__}")
@@ -41,13 +73,13 @@ def files(
     base_url: str = BASE_URL,
 ):
     """Upload one or more files."""
-    typer.echo(api.files(base_url, files))
+    typer.echo(post_files(base_url, files))
 
 
 @app.command()
 def repost(urls: t.List[str] = typer.Argument(..., min=1), base_url=BASE_URL):
     """Repost one or more urls."""
-    typer.echo(api.repost(base_url, urls))
+    typer.echo(post_repost(base_url, urls))
 
 
 @app.command()
@@ -60,4 +92,4 @@ def shorten(urls: t.List[str] = typer.Argument(..., min=1), base_url=BASE_URL):
             fg=typer.colors.RED,
             err=True,
         )
-    typer.echo(api.shorten(base_url, urls))
+    typer.echo(post_shorten(base_url, urls))
diff --git a/oxo/__init__.py b/oxo/__init__.py
deleted file mode 100644
index faa326f..0000000
--- a/oxo/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-from oxo._version import __version__
diff --git a/oxo/api.py b/oxo/api.py
deleted file mode 100644
index ffe80d0..0000000
--- a/oxo/api.py
+++ /dev/null
@@ -1,30 +0,0 @@
-import io
-import typing as t
-from pathlib import Path
-
-import httpx
-
-
-def post_to(base_url: str, *, data: t.Iterable[t.Dict]) -> str:
-    retval = []
-    with httpx.Client() as client:
-        for d in data:
-            if isinstance(d.get("file"), io.BufferedReader):
-                res = client.post(base_url, files=d)
-            else:
-                res = client.post(base_url, data=d)
-            res.raise_for_status()
-            retval.append(res.text.strip())
-    return " ".join(retval)
-
-
-def files(base_url, files: t.List[Path]):
-    return post_to(base_url, data=({"file": f.open("rb")} for f in files))
-
-
-def repost(base_url, urls: t.List[str]):
-    return post_to(base_url, data=({"url": u.strip()} for u in urls))
-
-
-def shorten(base_url, urls: t.List[str]):
-    return post_to(base_url, data=({"shorten": u.strip()} for u in urls))
diff --git a/pyproject.toml b/pyproject.toml
index 329e042..386090d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,23 @@
 [build-system]
-requires = ["setuptools", "wheel", "versioningit~=1.0.0"]
+requires = ["setuptools>=61.0.0", "wheel", "versioningit>=2.1.0"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "oxo"
+description = "A python interface to 0x0.st and mirrors"
+requires-python = ">=3.7"
+dynamic = ["version"]
+authors=[{name="grym", email="grym@ctrl-c.club"}]
+dependencies = ["typer[all]",
+                "httpx",
+                'importlib-metadata; python_version<"3.8"']
+
+[project.optional-dependencies]
+dev = ["pre-commit","pytest", "ipython"]
+
+[project.scripts]
+oxo = "oxo:app"
+
 [tool.versioningit]
 default-version = "0+unknown"
 
@@ -10,30 +26,3 @@ default-version = "0+unknown"
 distance = "{version}+{distance}.{vcs}{rev}"
 dirty = "{version}+{distance}.{vcs}{rev}.dirty"
 distance-dirty = "{version}+{distance}.{vcs}{rev}.dirty"
-
-[tool.versioningit.write]
-file = "oxo/_version.py"
-
-[tool.isort]
-skip='venv'
-profile='black'
-
-[tool.black]
-target-version = ['py36','py37', 'py38']
-exclude = '''
-(
-  /(
-      \.eggs         # exclude a few common directories in the
-    | \.git          # root of the project
-    | \.mypy_cache
-    | \.tox
-    | \.venv
-    | \.env
-    | \venv
-    | _build
-    | buck-out
-    | build
-    | dist
-  )/
-)
-'''
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 1d4dae6..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,27 +0,0 @@
-[metadata]
-name=oxo
-description="A python interface to 0x0.st"
-author= "grym"
-author_email = "grym@ctrl-c.club"
-url="https://tildegit.org/grym/oxo"
-
-[options]
-python_requires = >=3.8
-packages=find:
-install_requires=
-    httpx>=0.16.1
-    typer[all]
-
-[options.entry_points]
-console_scripts =
-    oxo = oxo.cli:app
-
-[options.extras_require]
-dev =
-    black>=20.8b1
-    coverage>=4.5.4
-    ipython
-    isort>=4.3.21
-    pre-commit
-    pudb
-    pytest
diff --git a/tests/test_oxo.py b/tests/test_oxo.py
index 6c6d4cd..a1be491 100644
--- a/tests/test_oxo.py
+++ b/tests/test_oxo.py
@@ -1,7 +1,6 @@
 from typer.testing import CliRunner
 
-from oxo import __version__
-from oxo.cli import app
+from oxo import __version__, app
 
 runner = CliRunner()