diff --git a/package.json b/package.json
index 3d72534..8391939 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "main": "./dist/index.js",
   "module": "./dist/esm/index.mjs",
   "scripts": {
-    "prepare": "husky install",
+    "prepare": "husky install && npm run build",
     "format": " prettier --ignore-path .gitignore \"**/*.{ts,js,json,mjs,tsx}\" -w",
     "lint": "eslint --ignore-path .gitignore \"**/*.{ts,js,json,mjs,tsx}\" --fix",
     "build": "tsx scripts/build.ts",
diff --git a/src/payment/payment.helper.ts b/src/payment/payment.helper.ts
index 0c82e99..fc57058 100644
--- a/src/payment/payment.helper.ts
+++ b/src/payment/payment.helper.ts
@@ -33,6 +33,8 @@ export function isPaymentMethod(code: string): code is PaymentMethod {
       'QRIS2',
       'SHOPEEPAY',
       'QRIS_SHOPEEPAY',
+      'DANA',
+      'OTHERBANKVA'
     ].includes(code)
   )
 }
diff --git a/src/payment/payment.interface.ts b/src/payment/payment.interface.ts
index b866a9f..b16206f 100644
--- a/src/payment/payment.interface.ts
+++ b/src/payment/payment.interface.ts
@@ -63,6 +63,7 @@ export type PaymentMethod =
   | 'DANAMONVA' // Danamon VA payment method
   | 'BNCVA' // BNC VA payment method
   | 'BSIVAOP' // BSI VA OP payment method
+  | 'OTHERBANKVA' // Other Bank VA payment method
   | 'ALFAMART' // Alfamart payment method
   | 'INDOMARET' // Indomaret payment method
   | 'ALFAMIDI' // Alfamidi payment method
@@ -72,3 +73,4 @@ export type PaymentMethod =
   | 'QRIS2' // QRIS 2 payment method
   | 'SHOPEEPAY' // Shopeepay payment method
   | 'QRIS_SHOPEEPAY' // QRIS Shopeepay payment method
+  | 'DANA' // DANA payment method
diff --git a/src/signature/signature.ts b/src/signature/signature.ts
index 0df3f54..213160c 100644
--- a/src/signature/signature.ts
+++ b/src/signature/signature.ts
@@ -41,7 +41,7 @@ export class Signature {
    */
   static callbackSignature(body: ICallback, privateKey: string) {
     return createHmac('sha256', privateKey)
-      .update(Buffer.from(body.toString()))
+      .update(Buffer.from(JSON.stringify(body)))
       .digest('hex')
   }
 }