diff --git a/certbot/MANIFEST.in b/certbot/MANIFEST.in
index 3b743ee1b..ef91a3e7c 100644
--- a/certbot/MANIFEST.in
+++ b/certbot/MANIFEST.in
@@ -6,3 +6,5 @@ recursive-include examples *
 recursive-include certbot/tests/testdata *
 recursive-include tests *.py
 include certbot/ssl-dhparams.pem
+global-exclude __pycache__
+global-exclude *.py[cod]