diff --git a/src/index.ts b/src/index.ts
index 57fe8d2..a3c1311 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -15,3 +15,4 @@ export type { EventData } from './elements/event-data'
 export type { EventMetadata } from './elements/event-metadata'
 export type { ProjectionHandler } from './elements/projection-handler'
 export type { ReactionHandler } from './elements/reaction-handler'
+export { flatten } from './utils/flatten'