diff --git a/package.json b/package.json
index d04629c..248ed55 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@extollo/lib",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "description": "The framework library that lifts up your code.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
diff --git a/src/support/bus/index.ts b/src/support/bus/index.ts
index 570a3d6..6a53799 100644
--- a/src/support/bus/index.ts
+++ b/src/support/bus/index.ts
@@ -6,6 +6,7 @@ export * from './serial/Serialization'
 export * from './serial/decorators'
 export * from './serial/NamedEventPayload'
 export * from './serial/JSONMessageEvent'
+export * from './StateEvent'
 
 export * from './Bus'
 export * from './LocalBus'