diff --git a/Makefile b/Makefile
index 5b350ed..b08e03c 100644
--- a/Makefile
+++ b/Makefile
@@ -51,33 +51,27 @@ clean-test: ## remove test and coverage artifacts
 	rm -fr htmlcov/
 
 lint: ## reformat with black and check style with flake8
-	isort superx_budget
-	isort tests
-	black superx_budget tests
-	flake8 superx_budget tests
+	.venv/bin/ruff format src tests noxfile.py
+	.venv/bin/ruff check src tests noxfile.py
 
 test: lint ## run tests quickly with the default Python
-	pytest tests -x --disable-warnings -m "not fun"
+	.venv/bin/pytest tests -x --disable-warnings -m "not fun"
 
 testall: lint ## run tests quickly with the default Python
-	pytest tests
+	.venv/bin/pytest tests
 
 coverage: lint ## full test suite, check code coverage and open coverage report
-	pytest tests --cov=superx_budget -m "fun"
-	coverage html
+	.venv/bin/pytest tests --cov=superx_budget -m "fun"
+	.venv/bin/coverage html
 	$(BROWSER) htmlcov/index.html
 
-tox:  ## run fully isolated tests with tox
-	tox
-
 install:  ## install updated project.toml with flint
-	flit install --pth-file
+	.venv/bin/pip3 install -e ".[dev,test]"
 
 devenv: ## setup development environment
 	python3 -m venv --prompt superx_budget .venv
 	.venv/bin/pip3 install --upgrade pip
-	.venv/bin/pip3 install "flit>3.2"
-	.venv/bin/flit install --pth-file
+	.venv/bin/pip3 install -e ".[dev,test]"
 
 repo: devenv ## complete project setup with development environment and git repo
 	git init .
diff --git a/pyproject.toml b/pyproject.toml
index 80695c0..2d56c72 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,40 +45,18 @@ Source = "https://git.cpi.imtek.uni-freiburg.de/CPI/superx-budget-overview.git"
 test = [
     "pytest >=4.0.0",
     "pytest-cov",
+    "pytest-icdiff",
     "pytest-mock",
     "pytest-randomly",
     "tox",
 ]
 dev = [
-    "black",
-    "flake8",
-    "flake8-comprehensions",
-    "flake8-bandit",
-    "isort >= 5.0.0",
+    "flit",
     "keyring",
     "pre-commit",
+    "ruff",
 ]
 
-[tool.black]
-line-length = 79
-target-version = ['py37','py38', 'py39']
-include = '\.pyi?$'
-extend-exclude = '''
-# A regex preceded with ^/ will apply only to files and directories
-# in the root of the project.
-^/.git
-^/.tox
-^/.venv
-^/.build
-^/.dist
-'''
-
-[tool.isort]
-line_length=79
-multi_line_output=3
-length_sort="True"
-include_trailing_comma="True"
-
 [tool.pytest.ini_options]
 markers = [
     "fun: marks tests as functional (deselect with '-m \"not fun\"')",
@@ -86,3 +64,48 @@ markers = [
 addopts = [
     "--strict-markers",
 ]
+
+
+[tool.ruff]
+# see https://docs.astral.sh/ruff/configuration/
+
+line-length = 80
+indent-width = 4
+
+fix = true
+
+[tool.ruff.lint]
+# Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`)  codes by default.
+# Unlike Flake8, Ruff doesn't enable pycodestyle warnings (`W`) or
+# McCabe complexity (`C901`) by default.
+fixable = ["ALL"]
+select = ["ALL"]
+ignore = [
+    # ignored for now, should be activated in the future
+    # docstrings
+    "D",
+
+    # don't complain about not annotating self or cls
+    "ANN101",
+    "ANN102",
+
+    # ignored, "ruff format" will handle this
+    "COM812", 
+    "ISC001",
+
+    # ignored, due to Windows / WSL2 setup
+    # flake8-executable
+    "EXE",
+]
+
+[tool.ruff.lint.pydocstyle]
+convention = "pep257"  # Accepts: "google", "numpy", or "pep257".
+
+[tool.ruff.lint.per-file-ignores]
+# see https://github.com/charliermarsh/ruff
+"tests/*" = ["FBT003", "INP001", "PLR2004", "S101", "SLF001", "ANN"]
+"noxfile.py" = ["ANN"]
+
+
+[tool.ruff.format]
+indent-style = "space"
\ No newline at end of file