diff --git a/Makefile b/Makefile
index 43bab9e..5ddfc8f 100644
--- a/Makefile
+++ b/Makefile
@@ -54,6 +54,7 @@
 
 clean:
 	find . -name '*.pyc' | xargs rm -f
+	find . -name '__pycache__' | xargs rm -rf
 	rm -rf \
     .tox \
     .coverage \