diff --git a/MANIFEST.in b/MANIFEST.in
index 8bee1e61f..31a9c256b 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -11,6 +11,7 @@ include Lib/fontTools/ttLib/tables/table_API_readme.txt
 
 include *requirements.txt
 include tox.ini
+include mypy.ini
 include run-tests.sh
 
 recursive-include Lib/fontTools py.typed