diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9fc916c..ac679da 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -47,8 +47,14 @@ jobs:
           pip install --requirement=requirements-test.txt
           pip install --editable=.[service]
 
-      - name: Run tests
-        run: pytest
+      - name: Run linters
+        if: matrix.python-version != '3.6' && matrix.python-version != '3.7'
+        run: |
+          poe lint
+
+      - name: Run software tests
+        run: |
+          poe test
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
diff --git a/apicast/__init__.py b/apicast/__init__.py
index 47e6780..e737040 100644
--- a/apicast/__init__.py
+++ b/apicast/__init__.py
@@ -1,3 +1,4 @@
 """Access bee flight forecast information published by Deutscher Wetterdienst (DWD)"""
+
 __appname__ = "apicast"
 __version__ = "0.8.6"
diff --git a/apicast/api.py b/apicast/api.py
index 329b78f..1e3ce2f 100644
--- a/apicast/api.py
+++ b/apicast/api.py
@@ -2,14 +2,19 @@
 # (c) 2020-2021 Andreas Motl <andreas@hiveeyes.org>
 # License: GNU Affero General Public License, Version 3
 import logging
-from typing import List, Dict
+from typing import Dict, List
 
 from fastapi import FastAPI, Query
 from fastapi.responses import HTMLResponse, PlainTextResponse
 
 from apicast import __appname__, __version__
-from apicast.core import (DwdBeeflightForecast, dwd_copyright, dwd_source,
-                          producer_link, producer_name)
+from apicast.core import (
+    DwdBeeflightForecast,
+    dwd_copyright,
+    dwd_source,
+    producer_link,
+    producer_name,
+)
 from apicast.format import Formatter
 
 app = FastAPI()
@@ -21,9 +26,11 @@
 
 @app.get("/", response_class=HTMLResponse)
 def index():
-
     appname = f"{__appname__} {__version__}"
-    description = "Apicast acquires bee flight forecast information published by Deutscher Wetterdienst (DWD)."
+    description = (
+        "Apicast acquires bee flight forecast information "
+        "published by Deutscher Wetterdienst (DWD)."
+    )
 
     data_index_items = []
     for location in dbf.get_station_slugs():
@@ -44,7 +51,7 @@ def index():
                 </div>
                 <div style="clear: both"/>
             </li>
-        """
+        """  # noqa: E501
         data_index_items.append(item)
 
     data_index_items_html = "\n".join(data_index_items)
@@ -105,12 +112,12 @@ def index():
             </ul>
         </body>
     </html>
-    """
+    """  # noqa: E501
 
 
 @app.get("/robots.txt", response_class=PlainTextResponse)
 def robots():
-    return f"""
+    return """
 User-agent: *
 Disallow: /beeflight/
     """.strip()
@@ -135,7 +142,6 @@ def beeflight_forecast_by_slug(
     format: str = Query(default="json"),
     translate: bool = Query(default=False),
 ):
-
     station_slug = f"{state}/{station}"
 
     try:
@@ -164,7 +170,7 @@ def beeflight_forecast_by_slug(
 
 
 def make_json_response(data: List[Dict], location: str = None):
-    response = {
+    return {
         "meta": {
             "source": dwd_source,
             "producer": f"{producer_name} - {producer_link}",
@@ -175,7 +181,6 @@ def make_json_response(data: List[Dict], location: str = None):
         },
         "data": data,
     }
-    return response
 
 
 def start_service(listen_address, reload: bool = False):
diff --git a/apicast/cli.py b/apicast/cli.py
index fc46bd9..267fc53 100644
--- a/apicast/cli.py
+++ b/apicast/cli.py
@@ -58,7 +58,7 @@ def run():
         # Start HTTP service with dynamic code reloading
         apicast service --reload
 
-    """
+    """  # noqa: E501
 
     name = f"{__appname__} {__version__}"
 
@@ -89,7 +89,6 @@ def run():
 
     # Run command.
     if options.stations:
-
         if options.slugs:
             result = dbf.get_station_slugs()
             print("\n".join(result))
@@ -106,7 +105,6 @@ def run():
 
 
 def format_beeflight_forecast(result, format="json"):
-
     if not result.data:
         raise ValueError("No data found or unable to parse")
 
diff --git a/apicast/core.py b/apicast/core.py
index 375f83f..c8b1813 100644
--- a/apicast/core.py
+++ b/apicast/core.py
@@ -9,6 +9,7 @@
 
 See also https://community.hiveeyes.org/t/dwd-prognose-bienenflug/787
 """
+
 import dataclasses
 from typing import List
 
@@ -20,7 +21,6 @@
 
 from apicast import __appname__, __version__
 
-
 user_agent = f"{__appname__}/{__version__}"
 dwd_source = "https://www.dwd.de/DE/leistungen/biene_flug/bienenflug.html"
 dwd_copyright = "© Deutscher Wetterdienst (DWD), Agricultural Meteorology Department"
@@ -54,7 +54,6 @@ def copy(self):
 
 
 class DwdBeeflightForecast:
-
     baseurl = "https://www.dwd.de/DE/leistungen/biene_flug/bienenflug.json?cl2Categories_LeistungsId=bienenflug"
 
     session = requests.Session()
@@ -62,7 +61,6 @@ class DwdBeeflightForecast:
 
     @ttl_cache(60 * 60 * 24)
     def get_states(self) -> List[State]:
-
         states: List[State] = []
 
         # Request federal states.
@@ -75,18 +73,16 @@ def get_states(self) -> List[State]:
 
             states.append(state)
 
-        # sites.sort(key=operator.attrgetter("label"))
+        # sites.sort(key=operator.attrgetter("label"))  # noqa: ERA001
 
         return states
 
     @ttl_cache(60 * 60 * 24)
     def get_stations(self) -> List[Station]:
-
         stations: List[Station] = []
 
         # Request federal states.
         for state in self.get_states():
-
             # Request sites.
             response = self.session.get(
                 self.baseurl,
@@ -111,7 +107,7 @@ def get_stations(self) -> List[Station]:
 
                 stations.append(station)
 
-        # sites.sort(key=operator.attrgetter("label"))
+        # sites.sort(key=operator.attrgetter("label"))  # noqa: ERA001
 
         return stations
 
@@ -130,7 +126,6 @@ def get_station_by_slug(self, slug):
 
     @ttl_cache(60 * 60)
     def get_data(self, station: Station) -> Result:
-
         response = self.session.get(
             self.baseurl,
             params={
@@ -155,10 +150,7 @@ def get_data(self, station: Station) -> Result:
         data = self.parse_html_table(table)
 
         # Ready.
-        result = Result(
-            station=station, station_name=station_name, data=data, footnote=footnote
-        )
-        return result
+        return Result(station=station, station_name=station_name, data=data, footnote=footnote)
 
     @staticmethod
     def parse_html_table(html):
diff --git a/apicast/format.py b/apicast/format.py
index b03a111..7d236d5 100644
--- a/apicast/format.py
+++ b/apicast/format.py
@@ -48,10 +48,10 @@ class Formatter:
     def __init__(self, result):
         self.result = deepcopy(result)
         self.data = self.result.data
-        self.title = u"### Prognose des Bienenfluges in {}".format(self.result.station_name)
+        self.title = "### Prognose des Bienenfluges in {}".format(self.result.station_name)
 
     def translate(self):
-        self.title = u"### Beeflight forecast for {}".format(self.result.station_name)
+        self.title = "### Beeflight forecast for {}".format(self.result.station_name)
         for item in self.data:
             for index, slot in enumerate(item):
                 for key, value in self.LABEL_MAP.items():
@@ -79,9 +79,9 @@ def machinify(self):
                 item[key] = value
         return data
 
+    # ruff: noqa: T201
     def table_markdown(self):
         with io.StringIO() as buffer, redirect_stdout(buffer):
-
             # Report about weather station / observation location
             print(self.title)
             print()
diff --git a/apicast/util.py b/apicast/util.py
index 4670b5f..6aacfb1 100644
--- a/apicast/util.py
+++ b/apicast/util.py
@@ -32,7 +32,6 @@ def configure_http_logging(options):
 def normalize_options(options):
     normalized = {}
     for key, value in options.items():
-
         # Add primary variant.
         key = key.strip("--<>")
         normalized[key] = value
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..69f45b7
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,94 @@
+[tool.pytest.ini_options]
+addopts = """
+  -ra -q --verbosity=3
+  --cov --cov-report=term-missing --cov-report=xml
+"""
+minversion = "2.0"
+log_level = "DEBUG"
+log_cli_level = "DEBUG"
+testpaths = [
+  "apicast",
+  "test",
+]
+xfail_strict = true
+
+[tool.coverage.run]
+source = ["apicast"]
+
+[tool.coverage.report]
+show_missing = true
+fail_under = 0
+omit = [
+    "test/*",
+]
+
+[tool.ruff]
+line-length = 100
+extend-exclude = [
+]
+
+[tool.ruff.lint]
+select = [
+    # Pycodestyle
+    "E",
+    "W",
+    # Pyflakes
+    "F",
+    # isort
+    "I",
+    # Bandit
+    "S",
+    # flake8-quotes
+    "Q",
+    # eradicate
+    "ERA",
+    # flake8-2020
+    "YTT",
+    # print
+    "T20",
+    # return
+    "RET",
+    # pyupgrade
+    # "UP",
+    # flake8-commas
+    "COM",
+    # future-annotations
+    # "FA",
+    # flake8-type-checking
+    "TCH",
+    # flake8-unused-arguments
+    "ARG",
+    # flake8-use-pathlib
+    # "PTH"
+]
+extend-ignore = [
+    # Unnecessary `elif` after `return` or `raise` statement.
+    "RET505",
+    "RET506",
+    # No trailing commas.
+    "COM812"
+]
+unfixable = ["ERA", "F401", "F841", "T20", "ERA001"]
+
+[tool.ruff.lint.per-file-ignores]
+"apicast/cli.py" = ["T201"]
+"test/*" = ["S101"]
+
+
+# ===================
+# Tasks configuration
+# ===================
+
+[tool.poe.tasks]
+format = [
+  {cmd="ruff format"},
+  {cmd="ruff check --fix"},
+]
+lint = [
+  {cmd="ruff check"},
+]
+test = [
+  {cmd="pytest"},
+]
+build = {cmd="python -m build"}
+check = ["lint", "test"]
diff --git a/requirements-test.txt b/requirements-test.txt
index 4dc0af4..c084824 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,5 +1,7 @@
 datadiff>=2.0,<3
 fastapi[test]
 marko<3
+poethepoet<0.26
 pytest>=6.1.0,<8
 pytest-cov<6
+ruff<0.4;python_version>='3.7'
diff --git a/setup.py b/setup.py
index fcdd145..e0fa995 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,8 @@
 # -*- coding: utf-8 -*-
 import os
 from io import open
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 here = os.path.abspath(os.path.dirname(__file__))
 README = open(os.path.join(here, "README.rst"), encoding="UTF-8").read()
@@ -10,8 +11,8 @@
     name="apicast",
     version="0.8.6",
     description="Python client and HTTP service to access bee flight forecast "
-                "information published by Deutscher Wetterdienst (DWD), the "
-                "federal meteorological service in Germany.",
+    "information published by Deutscher Wetterdienst (DWD), the "
+    "federal meteorological service in Germany.",
     long_description=README,
     license="AGPL 3, EUPL 1.2",
     classifiers=[
diff --git a/test/test_api.py b/test/test_api.py
index 7bb2532..40926ea 100644
--- a/test/test_api.py
+++ b/test/test_api.py
@@ -2,7 +2,6 @@
 
 from apicast.api import app
 
-
 client = TestClient(app)
 
 
diff --git a/test/test_data.py b/test/test_data.py
index 2b198d9..55bbb60 100644
--- a/test/test_data.py
+++ b/test/test_data.py
@@ -3,18 +3,15 @@
 import pytest
 from datadiff.tools import assert_equal
 
-from apicast.core import DwdBeeflightForecast, Station, State
+from apicast.core import DwdBeeflightForecast, State, Station
 
 dbf = DwdBeeflightForecast()
 
 
 @pytest.mark.data
 def test_get_data_success():
-
     stations = dbf.get_stations()
-    bavaria_hof = [
-        station for station in stations if station.identifier == "bifl_0042"
-    ][0]
+    bavaria_hof = [station for station in stations if station.identifier == "bifl_0042"][0]
 
     data_hof = dbf.get_data(station=bavaria_hof)
 
@@ -47,10 +44,10 @@ def test_get_data_success():
 @pytest.mark.data
 def test_get_data_invalid_station():
     station = Station(
-        state=State(label='Nordrhein-Westfalen', identifier='bifl_bl999'),
-        label='Bielefeld',
-        identifier='bifl_bl999',
-        slug='nordrhein-westfalen/bielefeld',
+        state=State(label="Nordrhein-Westfalen", identifier="bifl_bl999"),
+        label="Bielefeld",
+        identifier="bifl_bl999",
+        slug="nordrhein-westfalen/bielefeld",
     )
     with pytest.raises(ValueError) as ex:
         dbf.get_data(station=station)
@@ -59,11 +56,8 @@ def test_get_data_invalid_station():
 
 @pytest.mark.data
 def test_get_data_copy():
-
     stations = dbf.get_stations()
-    bavaria_hof = [
-        station for station in stations if station.identifier == "bifl_0042"
-    ][0]
+    bavaria_hof = [station for station in stations if station.identifier == "bifl_0042"][0]
 
     data_hof = dbf.get_data(station=bavaria_hof)
     data_hof_copy = data_hof.copy()
diff --git a/test/test_format.py b/test/test_format.py
index f8d79d4..057ae77 100644
--- a/test/test_format.py
+++ b/test/test_format.py
@@ -1,20 +1,23 @@
 import pytest
 
-from apicast.core import Result, Station, State
+from apicast.core import Result, State, Station
 from apicast.format import Formatter
 
-
 sample_result = Result(
     station=Station(
-        state=State(label='Brandenburg', identifier='bifl_bl04'), label='Potsdam', identifier='bifl_0021',
-        slug='brandenburg/potsdam'), station_name='Potsdam',
+        state=State(label="Brandenburg", identifier="bifl_bl04"),
+        label="Potsdam",
+        identifier="bifl_0021",
+        slug="brandenburg/potsdam",
+    ),
+    station_name="Potsdam",
     data=[
-        ['Datum', 'morgens', 'mittags', 'abends'],
-        ['Sa 30.03.', 'mittel', 'sehr hoch', 'hoch'],
-        ['So 31.03.', 'mittel', 'hoch', 'hoch'],
-        ['Mo 01.04.', 'mittel', 'hoch', 'mittel'],
+        ["Datum", "morgens", "mittags", "abends"],
+        ["Sa 30.03.", "mittel", "sehr hoch", "hoch"],
+        ["So 31.03.", "mittel", "hoch", "hoch"],
+        ["Mo 01.04.", "mittel", "hoch", "mittel"],
     ],
-    footnote='© Deutscher Wetterdienst, erstellt 30.03.2024 05:00 UTC. Alle Angaben ohne Gewähr!',
+    footnote="© Deutscher Wetterdienst, erstellt 30.03.2024 05:00 UTC. Alle Angaben ohne Gewähr!",
 )
 
 
@@ -30,21 +33,28 @@ def test_format_basic(formatter: Formatter):
 
 def test_format_normalize(formatter: Formatter):
     assert formatter.normalize() == [
-        {'Datum': 'Sa 30.03.', 'morgens': 'mittel', 'mittags': 'sehr hoch', 'abends': 'hoch'},
-        {'Datum': 'So 31.03.', 'morgens': 'mittel', 'mittags': 'hoch', 'abends': 'hoch'},
-        {'Datum': 'Mo 01.04.', 'morgens': 'mittel', 'mittags': 'hoch', 'abends': 'mittel'}]
+        {"Datum": "Sa 30.03.", "morgens": "mittel", "mittags": "sehr hoch", "abends": "hoch"},
+        {"Datum": "So 31.03.", "morgens": "mittel", "mittags": "hoch", "abends": "hoch"},
+        {"Datum": "Mo 01.04.", "morgens": "mittel", "mittags": "hoch", "abends": "mittel"},
+    ]
 
 
 def test_format_machinify(formatter: Formatter):
-    assert formatter.machinify() == [{'date': '2024-03-30', 'evening': 3, 'morning': 2, 'noon': 4},
-                                     {'date': '2024-03-31', 'evening': 3, 'morning': 2, 'noon': 3},
-                                     {'date': '2024-04-01', 'evening': 2, 'morning': 2, 'noon': 3}]
+    assert formatter.machinify() == [
+        {"date": "2024-03-30", "evening": 3, "morning": 2, "noon": 4},
+        {"date": "2024-03-31", "evening": 3, "morning": 2, "noon": 3},
+        {"date": "2024-04-01", "evening": 2, "morning": 2, "noon": 3},
+    ]
 
 
 def test_format_translate(formatter: Formatter):
     formatter.translate()
-    assert formatter.data == [['date', 'morning', 'noon', 'evening'], ['Sa 30.03.', 'medium', 'intensive', 'strong'],
-                              ['So 31.03.', 'medium', 'strong', 'strong'], ['Mo 01.04.', 'medium', 'strong', 'medium']]
+    assert formatter.data == [
+        ["date", "morning", "noon", "evening"],
+        ["Sa 30.03.", "medium", "intensive", "strong"],
+        ["So 31.03.", "medium", "strong", "strong"],
+        ["Mo 01.04.", "medium", "strong", "medium"],
+    ]
 
 
 def test_format_markdown(formatter: Formatter):
diff --git a/test/test_locations.py b/test/test_locations.py
index b213a0c..7b2c29d 100644
--- a/test/test_locations.py
+++ b/test/test_locations.py
@@ -3,13 +3,12 @@
 import pytest
 from datadiff.tools import assert_equal
 
-from apicast.core import DwdBeeflightForecast, Station, State
+from apicast.core import DwdBeeflightForecast, State, Station
 
 dbf = DwdBeeflightForecast()
 
 
 def test_get_states():
-
     states = dbf.get_states()
     bavaria = [state for state in states if state.identifier == "bifl_bl02"][0]
 
@@ -23,14 +22,9 @@ def test_get_states():
 
 
 def test_get_stations():
-
     stations = dbf.get_stations()
-    bavaria_hof = [
-        station for station in stations if station.identifier == "bifl_0042"
-    ][0]
-    berlin_tempelhof = [
-        station for station in stations if station.identifier == "bifl_0019"
-    ][0]
+    bavaria_hof = [station for station in stations if station.identifier == "bifl_0042"][0]
+    berlin_tempelhof = [station for station in stations if station.identifier == "bifl_0019"][0]
 
     assert_equal(
         dataclasses.asdict(bavaria_hof),
@@ -63,10 +57,10 @@ def test_get_station_by_slug_success():
     station = dbf.get_station_by_slug("brandenburg/potsdam")
 
     reference = Station(
-        state=State(label='Brandenburg', identifier='bifl_bl04'),
-        label='Potsdam',
-        identifier='bifl_0021',
-        slug='brandenburg/potsdam',
+        state=State(label="Brandenburg", identifier="bifl_bl04"),
+        label="Potsdam",
+        identifier="bifl_0021",
+        slug="brandenburg/potsdam",
     )
     assert station == reference