diff --git a/src/Webhook/index.ts b/src/Webhook/index.ts
index ce42278..dab5d87 100644
--- a/src/Webhook/index.ts
+++ b/src/Webhook/index.ts
@@ -214,9 +214,7 @@ export default class Webhook {
     // See: https://github.com/WhatsApp/WhatsApp-Nodejs-SDK/blob/58ca3d5fceea604e18393734578d9a7944a37b15/src/utils.ts#L77-L82
     // See: https://developers.facebook.com/docs/messenger-platform/webhooks#validate-payloads
     const getCalculatedSignature = (alg: string) => (appSecret: string) =>
-      createHmac(alg, appSecret)
-        .update(bodyString, "utf-8")
-        .digest("hex");
+      createHmac(alg, appSecret).update(bodyString, "utf8").digest("hex");
 
     const checkSignature = (alg: string, signature: string) => {
       const signatureCalculator = getCalculatedSignature(alg);