diff --git a/MANIFEST.in b/MANIFEST.in
index b3f9996..87f54d3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,3 +3,7 @@ include COPYING
 include README.md
 
 recursive-exclude * __pycache__
+recursive-exclude * *.py[co]
+recursive-include *.py
+recursive-include * *.py
+recursive-include * * *.py