diff --git a/certbot-nginx/MANIFEST.in b/certbot-nginx/MANIFEST.in
index 5545c88fb..65b27877e 100644
--- a/certbot-nginx/MANIFEST.in
+++ b/certbot-nginx/MANIFEST.in
@@ -2,3 +2,5 @@ include LICENSE.txt
 include README.rst
 recursive-include tests *
 recursive-include certbot_nginx/_internal/tls_configs *.conf
+global-exclude __pycache__
+global-exclude *.py[cod]