diff --git a/pyproject.toml b/pyproject.toml
index 5cac3249..f44158d1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,10 +29,20 @@ version = {attr =  "pmb.__version__"}
 exclude = ["aports", "docs", "keys", "test", "test.pmb_test"]
 
 [tool.ruff]
+line-length=100
+# Assume Python 3.8
+target-version = "py38"
 # E402: module import not on top of file, not possible for testcases
 # E722: do not use bare except
 lint.ignore=["E402", "E722"]
-line-length=100
+
+[tool.ruff.lint.extend-per-file-ignores]
+# F401: imported but unused, common for __init__.py files
+"__init__.py" = ["F401"]
+
+[tool.ruff.format]
+# Enable auto-formatting of code examples in docstrings.
+docstring-code-format = true
 
 [tool.pytest.ini_options]
 addopts = [