diff --git a/MANIFEST.in b/MANIFEST.in
index 019e37a..68946b7 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1 @@
-include README.md LICENSE docs/* examples/*.py examples/*.png examples/*.lark tests/*.py tests/test_nearley/*.py tests/test_nearley/grammars/*
+include README.md LICENSE docs/* examples/*.py examples/*.png examples/*.lark tests/*.py tests/*.lark tests/grammars/* tests/test_nearley/*.py tests/test_nearley/grammars/*