diff --git a/MANIFEST.in b/MANIFEST.in
index 67a6330..14ab34f 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -16,4 +16,6 @@ global-exclude *.pyc
 global-exclude *.cache
 exclude src/propcache/*.c
 exclude src/propcache/*.html
+exclude src/propcache/*.so
+exclude src/propcache/*.pyd
 prune docs/_build