diff --git a/src/utils/HTTPClient.ts b/src/utils/HTTPClient.ts
index 4ba9d892..a7962532 100644
--- a/src/utils/HTTPClient.ts
+++ b/src/utils/HTTPClient.ts
@@ -4,8 +4,8 @@ import {
   Platform,
   generateSidAuth,
   getRandomUserAgent,
-  getStringBetweenStrings,
-  InnertubeError
+  InnertubeError,
+  getCookie
 } from './Utils.js';
 
 import type { Context, Session } from '../core/index.js';
@@ -14,6 +14,7 @@ import type { FetchFunction } from '../types/index.js';
 export interface HTTPClientInit {
   baseURL?: string;
 }
+
 export default class HTTPClient {
   #session: Session;
   #cookie?: string;
@@ -137,10 +138,10 @@ export default class HTTPClient {
       }
 
       if (this.#cookie) {
-        const papisid = getStringBetweenStrings(this.#cookie, 'PAPISID=', ';');
+        const sapisid = getCookie(this.#cookie, 'SAPISID');
 
-        if (papisid) {
-          request_headers.set('Authorization', await generateSidAuth(papisid));
+        if (sapisid) {
+          request_headers.set('Authorization', await generateSidAuth(sapisid));
           request_headers.set('X-Goog-Authuser', this.#session.account_index.toString());
         }
 
diff --git a/src/utils/Utils.ts b/src/utils/Utils.ts
index 7f9068a4..02c86d30 100644
--- a/src/utils/Utils.ts
+++ b/src/utils/Utils.ts
@@ -239,4 +239,10 @@ export function base64ToU8(base64: string): Uint8Array {
 
 export function isTextRun(run: TextRun | EmojiRun): run is TextRun {
   return !('emoji' in run);
+}
+
+export function getCookie(cookies: string, name: string, matchWholeName = false): string | undefined {
+  const regex = matchWholeName ? `(^|\\s?)\\b${name}\\b=([^;]+)` : `(^|s?)${name}=([^;]+)`;
+  const match = cookies.match(new RegExp(regex));
+  return match ? match[2] : undefined;
 }
\ No newline at end of file