diff --git a/src/index.ts b/src/index.ts
index 2ac6c17..1067233 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -6,7 +6,15 @@ import type { EventType } from './EventType.js';
 import { isSubjectOnEventId } from './isSubjectOnEventId.js';
 import { isSubjectPristine } from './isSubjectPristine.js';
 import type { ObserveEventsOptions } from './ObserveEventsOptions.js';
+import type { Precondition } from './Precondition.js';
 import type { ReadEventsOptions } from './ReadEventsOptions.js';
 
 export { Client, Container, isSubjectOnEventId, isSubjectPristine };
-export type { Event, EventCandidate, EventType, ObserveEventsOptions, ReadEventsOptions };
+export type {
+	Event,
+	EventCandidate,
+	EventType,
+	ObserveEventsOptions,
+	Precondition,
+	ReadEventsOptions,
+};