diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..745ff5b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,11 @@
+[tool.black]
+line-length = 88
+include = '\.pyi?$'
+exclude = '''
+/(
+  | \.git
+  | \.venv
+  | venv
+  | __pycache__
+)/
+'''