diff --git a/Makefile b/Makefile
index 8e9a47e..13d6097 100644
--- a/Makefile
+++ b/Makefile
@@ -11,3 +11,6 @@ flake8:
 
 mypy:
 	mypy --strict --disallow-any-explicit node.py avl.py wavl.py ravl.py
+
+clean:
+	rm -rf __pycache__ .hypothesis .mypy_cache .pytest_cache