diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..e989deb
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,9 @@
+root = true
+
+[*.py]
+indent_style = space
+tab_width = 4
+
+[*.toml]
+indent_style = space
+tab_width = 2
diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..25930c9
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,13 @@
+[flake8]
+# E241 multiple spaces after ':' [ want to align stuff ]
+# E266 too many leading '#' for block comment [ I like marking disabled code blocks with '### ' ]
+# E402 module level import not at top of file [ usually on purpose. might use individual overrides instead? ]
+# E701 multiple statements on one line (colon) [ perfectly readable ]
+# E713 test for membership should be ‘not in’ [ disagree: want `not a in x` ]
+# E714 test for object identity should be 'is not' [ disagree: want `not a is x` ]
+# W503 line break before binary operator [ gotta pick one way ]
+extend-ignore = E241,E266,E402,E701,E713,E714,W503
+exclude = 00*.py,generated.py,incremental_patch
+# we sometimes have long comments, and there is only one limit for all
+max-line-length = 120
+# max-complexity = 20
diff --git a/.gitignore b/.gitignore
index 2a45ed7..84f13f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *.pyc
 .vscode
+poetry.lock
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..c10574c
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,146 @@
+# This file is automatically @generated by Poetry 2.1.1 and should not be changed by hand.
+
+[[package]]
+name = "flake8"
+version = "7.2.0"
+description = "the modular source code checker: pep8 pyflakes and co"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "flake8-7.2.0-py2.py3-none-any.whl", hash = "sha256:93b92ba5bdb60754a6da14fa3b93a9361fd00a59632ada61fd7b130436c40343"},
+    {file = "flake8-7.2.0.tar.gz", hash = "sha256:fa558ae3f6f7dbf2b4f22663e5343b6b6023620461f8d4ff2019ef4b5ee70426"},
+]
+
+[package.dependencies]
+mccabe = ">=0.7.0,<0.8.0"
+pycodestyle = ">=2.13.0,<2.14.0"
+pyflakes = ">=3.3.0,<3.4.0"
+
+[[package]]
+name = "mccabe"
+version = "0.7.0"
+description = "McCabe checker, plugin for flake8"
+optional = true
+python-versions = ">=3.6"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "mccabe-0.7.0-py2.py3-none-any.whl", hash = "sha256:6c2d30ab6be0e4a46919781807b4f0d834ebdd6c6e3dca0bda5a15f863427b6e"},
+    {file = "mccabe-0.7.0.tar.gz", hash = "sha256:348e0240c33b60bbdf4e523192ef919f28cb2c3d7d5c7794f74009290f236325"},
+]
+
+[[package]]
+name = "mypy"
+version = "1.15.0"
+description = "Optional static typing for Python"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "mypy-1.15.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:979e4e1a006511dacf628e36fadfecbcc0160a8af6ca7dad2f5025529e082c13"},
+    {file = "mypy-1.15.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:c4bb0e1bd29f7d34efcccd71cf733580191e9a264a2202b0239da95984c5b559"},
+    {file = "mypy-1.15.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:be68172e9fd9ad8fb876c6389f16d1c1b5f100ffa779f77b1fb2176fcc9ab95b"},
+    {file = "mypy-1.15.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:c7be1e46525adfa0d97681432ee9fcd61a3964c2446795714699a998d193f1a3"},
+    {file = "mypy-1.15.0-cp310-cp310-musllinux_1_2_x86_64.whl", hash = "sha256:2e2c2e6d3593f6451b18588848e66260ff62ccca522dd231cd4dd59b0160668b"},
+    {file = "mypy-1.15.0-cp310-cp310-win_amd64.whl", hash = "sha256:6983aae8b2f653e098edb77f893f7b6aca69f6cffb19b2cc7443f23cce5f4828"},
+    {file = "mypy-1.15.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:2922d42e16d6de288022e5ca321cd0618b238cfc5570e0263e5ba0a77dbef56f"},
+    {file = "mypy-1.15.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:2ee2d57e01a7c35de00f4634ba1bbf015185b219e4dc5909e281016df43f5ee5"},
+    {file = "mypy-1.15.0-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:973500e0774b85d9689715feeffcc980193086551110fd678ebe1f4342fb7c5e"},
+    {file = "mypy-1.15.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:5a95fb17c13e29d2d5195869262f8125dfdb5c134dc8d9a9d0aecf7525b10c2c"},
+    {file = "mypy-1.15.0-cp311-cp311-musllinux_1_2_x86_64.whl", hash = "sha256:1905f494bfd7d85a23a88c5d97840888a7bd516545fc5aaedff0267e0bb54e2f"},
+    {file = "mypy-1.15.0-cp311-cp311-win_amd64.whl", hash = "sha256:c9817fa23833ff189db061e6d2eff49b2f3b6ed9856b4a0a73046e41932d744f"},
+    {file = "mypy-1.15.0-cp312-cp312-macosx_10_13_x86_64.whl", hash = "sha256:aea39e0583d05124836ea645f412e88a5c7d0fd77a6d694b60d9b6b2d9f184fd"},
+    {file = "mypy-1.15.0-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:2f2147ab812b75e5b5499b01ade1f4a81489a147c01585cda36019102538615f"},
+    {file = "mypy-1.15.0-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:ce436f4c6d218a070048ed6a44c0bbb10cd2cc5e272b29e7845f6a2f57ee4464"},
+    {file = "mypy-1.15.0-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:8023ff13985661b50a5928fc7a5ca15f3d1affb41e5f0a9952cb68ef090b31ee"},
+    {file = "mypy-1.15.0-cp312-cp312-musllinux_1_2_x86_64.whl", hash = "sha256:1124a18bc11a6a62887e3e137f37f53fbae476dc36c185d549d4f837a2a6a14e"},
+    {file = "mypy-1.15.0-cp312-cp312-win_amd64.whl", hash = "sha256:171a9ca9a40cd1843abeca0e405bc1940cd9b305eaeea2dda769ba096932bb22"},
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+    {file = "mypy-1.15.0-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:c43a7682e24b4f576d93072216bf56eeff70d9140241f9edec0c104d0c515036"},
+    {file = "mypy-1.15.0-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:baefc32840a9f00babd83251560e0ae1573e2f9d1b067719479bfb0e987c6357"},
+    {file = "mypy-1.15.0-cp313-cp313-win_amd64.whl", hash = "sha256:b9378e2c00146c44793c98b8d5a61039a048e31f429fb0eb546d93f4b000bedf"},
+    {file = "mypy-1.15.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:e601a7fa172c2131bff456bb3ee08a88360760d0d2f8cbd7a75a65497e2df078"},
+    {file = "mypy-1.15.0-cp39-cp39-macosx_11_0_arm64.whl", hash = "sha256:712e962a6357634fef20412699a3655c610110e01cdaa6180acec7fc9f8513ba"},
+    {file = "mypy-1.15.0-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:f95579473af29ab73a10bada2f9722856792a36ec5af5399b653aa28360290a5"},
+    {file = "mypy-1.15.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:8f8722560a14cde92fdb1e31597760dc35f9f5524cce17836c0d22841830fd5b"},
+    {file = "mypy-1.15.0-cp39-cp39-musllinux_1_2_x86_64.whl", hash = "sha256:1fbb8da62dc352133d7d7ca90ed2fb0e9d42bb1a32724c287d3c76c58cbaa9c2"},
+    {file = "mypy-1.15.0-cp39-cp39-win_amd64.whl", hash = "sha256:d10d994b41fb3497719bbf866f227b3489048ea4bbbb5015357db306249f7980"},
+    {file = "mypy-1.15.0-py3-none-any.whl", hash = "sha256:5469affef548bd1895d86d3bf10ce2b44e33d86923c29e4d675b3e323437ea3e"},
+    {file = "mypy-1.15.0.tar.gz", hash = "sha256:404534629d51d3efea5c800ee7c42b72a6554d6c400e6a79eafe15d11341fd43"},
+]
+
+[package.dependencies]
+mypy_extensions = ">=1.0.0"
+typing_extensions = ">=4.6.0"
+
+[package.extras]
+dmypy = ["psutil (>=4.0)"]
+faster-cache = ["orjson"]
+install-types = ["pip"]
+mypyc = ["setuptools (>=50)"]
+reports = ["lxml"]
+
+[[package]]
+name = "mypy-extensions"
+version = "1.1.0"
+description = "Type system extensions for programs checked with the mypy type checker."
+optional = true
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "mypy_extensions-1.1.0-py3-none-any.whl", hash = "sha256:1be4cccdb0f2482337c4743e60421de3a356cd97508abadd57d47403e94f5505"},
+    {file = "mypy_extensions-1.1.0.tar.gz", hash = "sha256:52e68efc3284861e772bbcd66823fde5ae21fd2fdb51c62a211403730b916558"},
+]
+
+[[package]]
+name = "pycodestyle"
+version = "2.13.0"
+description = "Python style guide checker"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "pycodestyle-2.13.0-py2.py3-none-any.whl", hash = "sha256:35863c5974a271c7a726ed228a14a4f6daf49df369d8c50cd9a6f58a5e143ba9"},
+    {file = "pycodestyle-2.13.0.tar.gz", hash = "sha256:c8415bf09abe81d9c7f872502a6eee881fbe85d8763dd5b9924bb0a01d67efae"},
+]
+
+[[package]]
+name = "pyflakes"
+version = "3.3.2"
+description = "passive checker of Python programs"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "pyflakes-3.3.2-py2.py3-none-any.whl", hash = "sha256:5039c8339cbb1944045f4ee5466908906180f13cc99cc9949348d10f82a5c32a"},
+    {file = "pyflakes-3.3.2.tar.gz", hash = "sha256:6dfd61d87b97fba5dcfaaf781171ac16be16453be6d816147989e7f6e6a9576b"},
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.13.2"
+description = "Backported and Experimental Type Hints for Python 3.8+"
+optional = true
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"dev\""
+files = [
+    {file = "typing_extensions-4.13.2-py3-none-any.whl", hash = "sha256:a439e7c04b49fec3e5d3e2beaa21755cadbbdc391694e28ccdd36ca4a1408f8c"},
+    {file = "typing_extensions-4.13.2.tar.gz", hash = "sha256:e6c81219bd689f51865d9e372991c540bda33a0379d5573cddb9a3a23f7caaef"},
+]
+
+[extras]
+dev = ["flake8", "mypy"]
+
+[metadata]
+lock-version = "2.1"
+python-versions = "~=3.11"
+content-hash = "596c29b3a42200dd29263138060c0256a2184d7f8f7329685a1db6b44593dd63"
diff --git a/prometheus/__init__.py b/prometheus/__init__.py
deleted file mode 100644
index 8d943c3..0000000
--- a/prometheus/__init__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from prometheus.registry import Registry, Path, GLOBAL_REGISTRY
-from prometheus.metrics import *
-from prometheus.metric_base import NOW
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..c7e2bbf
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,41 @@
+[build-system]
+requires = ["flit_core >=3.2,<4"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "prometheus_rus"
+version = "0.1.0"
+authors = [
+    {name = "Stefan Bühler", email = "stefan.buehler@tik.uni-stuttgart.de"},
+]
+license = "Apache Software License 2.0"
+classifiers = [
+    "Private :: Do Not Upload",
+    "License :: OSI Approved :: Apache Software License",
+]
+dynamic = ["version", "description"]
+
+requires-python = "~=3.11"
+dependencies = []
+
+[project.urls]
+Home = "https://github.tik.uni-stuttgart.de/NKS/python-prometheus/"
+
+[project.optional-dependencies]
+dev = [
+  "flake8",
+  "mypy",
+]
+
+[tool.black]
+line-length = 120
+
+[tool.mypy]
+mypy_path = "src"
+files = "src"
+
+[tool.pyright]
+include = ["src"]
+
+[tool.isort]
+profile = "black"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 4a2dffb..0000000
--- a/setup.py
+++ /dev/null
@@ -1,34 +0,0 @@
-from setuptools import setup
-
-setup(
-    name="prometheus_client_rus",
-    version="0.1.0",
-    author="Stefan Buehler",
-    author_email="stefan.buehler@tik.uni-stuttgart.de",
-    description="Python client for the Prometheus monitoring system (RUS version).",
-    long_description=(
-        "See https://github.tik.uni-stuttgart.de/NKS/python-prometheus/blob/master/README.md"
-        " for documentation."),
-    license="Apache Software License 2.0",
-    keywords="prometheus monitoring instrumentation client",
-    url="https://github.tik.uni-stuttgart.de/NKS/python-prometheus/",
-    packages=[
-        'prometheus',
-    ],
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "Intended Audience :: Information Technology",
-        "Intended Audience :: System Administrators",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: Implementation :: CPython",
-        "Programming Language :: Python :: Implementation :: PyPy",
-        "Topic :: System :: Monitoring",
-        "License :: OSI Approved :: Apache Software License",
-    ],
-)
diff --git a/src/prometheus_rus/__init__.py b/src/prometheus_rus/__init__.py
new file mode 100644
index 0000000..d0376d9
--- /dev/null
+++ b/src/prometheus_rus/__init__.py
@@ -0,0 +1,13 @@
+from ._registry import (  # noqa: reexport
+    Registry as Registry,
+    Path as Path,
+    GLOBAL_REGISTRY as GLOBAL_REGISTRY,
+)
+from ._metrics import (  # noqa: reexport
+    Counter as Counter,
+    Gauge as Gauge,
+    Summary as Summary,
+)
+from ._metric_base import (  # noqa: reexport
+    NOW as NOW,
+)
diff --git a/prometheus/metric_base.py b/src/prometheus_rus/_metric_base.py
similarity index 98%
rename from prometheus/metric_base.py
rename to src/prometheus_rus/_metric_base.py
index 4b572d5..338c888 100644
--- a/prometheus/metric_base.py
+++ b/src/prometheus_rus/_metric_base.py
@@ -3,7 +3,7 @@ import typing
 import time
 import abc
 
-from .path import Path
+from ._path import Path
 
 
 class Now(typing.NamedTuple):
diff --git a/prometheus/metrics.py b/src/prometheus_rus/_metrics.py
similarity index 89%
rename from prometheus/metrics.py
rename to src/prometheus_rus/_metrics.py
index 882f496..1689734 100644
--- a/prometheus/metrics.py
+++ b/src/prometheus_rus/_metrics.py
@@ -1,13 +1,7 @@
 import typing
 
-from .metric_base import MetricBase, MetricGroupBase, MetricGroupDefinition, MetricMutableValue, Now, NOW
-from .registry import Path, GLOBAL_REGISTRY
-
-__all__ = [
-    'Counter',
-    'Gauge',
-    'Summary',
-]
+from ._metric_base import MetricBase, MetricGroupBase, MetricGroupDefinition, MetricMutableValue, Now, NOW
+from ._registry import Path, GLOBAL_REGISTRY
 
 
 class Counter(MetricBase):
diff --git a/prometheus/path.py b/src/prometheus_rus/_path.py
similarity index 100%
rename from prometheus/path.py
rename to src/prometheus_rus/_path.py
diff --git a/prometheus/registry.py b/src/prometheus_rus/_registry.py
similarity index 98%
rename from prometheus/registry.py
rename to src/prometheus_rus/_registry.py
index 62b10a5..1156188 100644
--- a/prometheus/registry.py
+++ b/src/prometheus_rus/_registry.py
@@ -5,8 +5,8 @@ import collections
 import time
 import math
 
-from .metric_base import MetricValue, MetricBase, MetricGroupDefinition, MetricGroupBase, EMPTY_GROUP_DEFINITION
-from .path import Path, Labels
+from ._metric_base import MetricValue, MetricBase, MetricGroupDefinition, MetricGroupBase, EMPTY_GROUP_DEFINITION
+from ._path import Path, Labels
 
 
 class _MetricGroup:
diff --git a/test.py b/test.py
index 493520c..71c9ed2 100644
--- a/test.py
+++ b/test.py
@@ -1,4 +1,4 @@
-from prometheus import Path, Counter, Gauge, Summary, GLOBAL_REGISTRY, NOW
+from prometheus_rus import Path, Counter, Gauge, Summary, GLOBAL_REGISTRY, NOW
 
 g1 = Gauge(value=20, path=Path("foobar_g1", {"server": "[host:xy]"}), help="foo help with bar")
 g2 = Gauge(path=Path("foobar_g2", {"server": "[host:xy]"}), help="foo help with bar")
diff --git a/venv-lints.sh b/venv-lints.sh
new file mode 100755
index 0000000..4e9bc4d
--- /dev/null
+++ b/venv-lints.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+set -e
+
+cd "$(dirname "$(readlink "$0")")"
+
+sources=($@)
+if [ "${#sources[@]}" -eq 0 ]; then
+    sources=(src)
+fi
+
+rc=0
+
+run() {
+    # remember last failure
+    if "$@"; then :; else rc=$?; fi
+}
+
+export PYTHONDONTWRITEBYTECODE=1
+
+poetry sync --extras=dev --quiet || poetry sync --extras=dev
+
+echo "flake8:"
+run poetry run flake8 "${sources[@]}"
+echo "mypy:"
+run poetry run mypy
+
+# run formatters?
+# black . && isort .
+
+exit $rc