diff --git a/src/chain/blockchain.ts b/src/chain/blockchain.ts
index 903057d..dc88216 100644
--- a/src/chain/blockchain.ts
+++ b/src/chain/blockchain.ts
@@ -6,6 +6,7 @@ import {
   IChainData,
 } from "../configs/config_chain";
 import {
+  ACCOUNT_CHANGE,
   EventBus,
   NEED_CHANGE_CHAIN,
   NEED_LOGIN,
@@ -330,6 +331,12 @@ export class Blockchain {
         if (UserModule.accountId !== accounts[0]) {
           this.clearCachedProvider();
           await UserModule.LogOut();
+          EventBus.$emit(ACCOUNT_CHANGE, accounts[0]);
+          let event = new Event("account_change", {
+            bubbles: true,
+            cancelable: false,
+          });
+          window.dispatchEvent(event);
           setTimeout(() => {
             location.reload();
           }, 1000);
diff --git a/src/index.ts b/src/index.ts
index 081a38a..93fd29f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -36,3 +36,5 @@ export class JCChain {
 }
 
 export * from "./utils/event-bus";
+export * from "./utils/chain.util";
+export * from "./utils/browser";