diff --git a/MANIFEST.in b/MANIFEST.in
index 77a7463..c128eb2 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,3 +2,6 @@ include *.rst
 include *.txt
 
 recursive-include pythongettext *
+
+global-exclude *.pyc
+global-exclude *.pyo