diff --git a/Makefile b/Makefile
index 7111474..1cca16a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
 clean:
-	rm -rf .coverage cover nosetests.xml coverage.xml .tox *.egg-info dist
+	rm -rf .coverage cover nosetests.xml coverage.xml .tox *.egg-info dist build
 	find . -name '*.pyc' -exec rm '{}' ';'
 	find . -name '__pycache__' -exec rm -rf {} \;
\ No newline at end of file