diff --git a/src/ainize.ts b/src/ainize.ts
index ae8550f..ee0dab5 100644
--- a/src/ainize.ts
+++ b/src/ainize.ts
@@ -6,11 +6,14 @@ import AppController from "./controllers/appController";
 import Model from "./model";
 import { deployConfig } from "./types/type";
 import AinModule from "./ain";
+import Internal from "./internal";
+
 export default class Ainize {
   private cache: NodeCache;
-  ain: AinModule = AinModule.getInstance();
   private handler: Handler = Handler.getInstance();
+  ain: AinModule = AinModule.getInstance();
   middleware: Middleware;
+  internal: Internal;
   appController: AppController = AppController.getInstance();
 
   constructor(chainId: 1 | 0) {
@@ -18,6 +21,7 @@ export default class Ainize {
     this.handler.connect();
     this.cache = new NodeCache();
     this.middleware = new Middleware(this.cache);
+    this.internal = new Internal();
   }
   
   static createAinAccount () {
diff --git a/src/internal.ts b/src/internal.ts
index 1ae9b53..1fa53c3 100644
--- a/src/internal.ts
+++ b/src/internal.ts
@@ -5,8 +5,9 @@ import { HISTORY_TYPE, RESPONSE_STATUS, deposit, request, response } from "./typ
 import { buildTxBody } from "./utils/builder";
 import AinModule from "./ain";
 
-export default class internal {
+export default class Internal {
   private ain = AinModule.getInstance();
+  
   async handleDeposit(req: Request) {
     const { requesterAddress, appName, transferKey, transferValue } = this.getDataFromDepositRequest(req);
     const ops: SetOperation[] = [];