diff --git a/MANIFEST.in b/MANIFEST.in
index 58e8d0f0c1fee..a2268846c98d1 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -27,6 +27,7 @@ graft airflow/www/templates
 graft airflow/_vendor/
 include airflow/alembic.ini
 include airflow/git_version
+include airflow/serialization/schema.json
 graft scripts/systemd
 graft scripts/upstart
 graft airflow/config_templates