diff --git a/MANIFEST.in b/MANIFEST.in
index 086d36b..a08e705 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,3 +2,7 @@ include LICENSE* setup_helpers.py README.*
 graft doc
 graft tests
 include terminals.toml
+
+global-exclude __pycache__
+global-exclude *.pyc
+global-exclude *.pyo