diff --git a/src/rest/APIRequest.js b/src/rest/APIRequest.js
index 7853928..0c53436 100644
--- a/src/rest/APIRequest.js
+++ b/src/rest/APIRequest.js
@@ -44,6 +44,9 @@ class APIRequest {
       'User-Agent': this.fullUserAgent,
     };
 
+    // Edit UA
+    this.client.options.http.headers['User-Agent'] = this.fullUserAgent;
+
     if (this.options.auth !== false) headers.Authorization = this.rest.getAuth();
     if (this.options.reason) headers['X-Audit-Log-Reason'] = encodeURIComponent(this.options.reason);
     if (this.options.headers) headers = Object.assign(headers, this.options.headers);
diff --git a/src/util/Constants.js b/src/util/Constants.js
index 6e6609b..6291638 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -80,9 +80,9 @@ exports.localeObject = {
   'zh-TW': 'TAIWAN_CHINESE',
   ko: 'KOREAN',
 };
-
+// No used
 exports.UserAgent = listUserAgent[Math.floor(Math.random() * listUserAgent.length)];
-
+// Useful
 exports.randomUA = () => listUserAgent[Math.floor(Math.random() * listUserAgent.length)];
 
 exports.WSCodes = {
diff --git a/src/util/Options.js b/src/util/Options.js
index 86ca317..a49911d 100644
--- a/src/util/Options.js
+++ b/src/util/Options.js
@@ -220,7 +220,7 @@ class Options extends null {
           ).toString('base64')}`,
           'X-Discord-Locale': 'en-US',
           Origin: 'https://discord.com',
-          'user-agent':
+          'User-Agent':
             'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) discord/1.0.9004 Chrome/91.0.4472.164 Electron/13.6.6 Safari/537.36',
         },
         agent: {},