diff --git a/MANIFEST.in b/MANIFEST.in
index 9eed65f..9df61ce 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,12 +2,14 @@ include src/mmh3/*.c
 include src/mmh3/*.h
 include src/mmh3/*.pyi
 include src/mmh3/py.typed
-include src/mmh3/_mmh3/*.c
-include src/mmh3/_mmh3/*.h
+include src/mmh3/_mmh3/*
 include README.md
 include LICENSE
 include CHANGELOG.md
 include CODE_OF_CONDUCT.md
 include pyproject.toml
 include setup.py
-include MANIFEST.in
\ No newline at end of file
+include MANIFEST.in
+exclude src/mmh3/_mmh3/refresh.py
+exclude src/mmh3/_mmh3/FILE_HEADER
+exclude src/mmh3/_mmh3/README.md
\ No newline at end of file