diff --git a/jetbra.js b/jetbra.js
index d670d98..7159bf4 100644
--- a/jetbra.js
+++ b/jetbra.js
@@ -1,21 +1,113 @@
 // ==UserScript==
 // @name         JetBra
 // @namespace    https://github.com/novice88/jetbra
-// @version      3.4
+// @version      4.0
 // @license MIT
 // @description  Add a button on the plugin homepage and click to get the plugin activation code
 // @author       novice.li
 // @match        https://plugins.jetbrains.com/*
 // @grant        GM_setClipboard
 // @grant        GM_addStyle
-// @grant        GM_xmlhttpRequest
 // @grant        window.onurlchange
-// @connect noviceli.win
-// @connect novitechie.com
-// @connect self
-// @connect localhost
+// @downloadURL https://update.greasyfork.org/scripts/480799/JetBra.user.js
+// @updateURL https://update.greasyfork.org/scripts/480799/JetBra.meta.js
 // ==/UserScript==
 
+const pemEncodedKey = `-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`;
+
+
+const pemEncodedCrt = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`;
+
+function injectStyles() {
+    GM_addStyle(`
+        .jetbra-button {
+            background-color: #04AA6D; border: none; color: white; padding: 8px 24px;
+            text-align: center; text-decoration: none; display: inline-block;
+            border-radius: 16px; box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
+            transition-duration: 0.4s;
+        }
+        .jetbra-button:hover { background-color: #057e47; color: white; }
+    `);
+}
+
 
 async function findElementWithRetry(cssSelector) {
     const maxAttempts = 50;
@@ -29,29 +121,50 @@ async function findElementWithRetry(cssSelector) {
     throw new Error(`Element with selector '${cssSelector}' not found after ${maxAttempts} attempts.`);
 }
 
-let addButton = async function () {
-    console.log('JetBra is running');
-    'use strict';
-    GM_addStyle(`
-    .jetbra-button {
-        background-color: #04AA6D;
-        border: none;
-        color: white;
-        padding: 8px 24px;
-        text-align: center;
-        text-decoration: none;
-        display: inline-block;
-        border-radius: 16px;
-        box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
-        transition-duration: 0.4s;
-    }
+function pem2base64(pem) {
+    return pem.split('\n').reduce((base64, line) => line.includes("--") ? base64 : base64 + line, '');
+}
 
-    .jetbra-button:hover {
-        background-color: #057e47;
-        color: white;
-    }
-`);
-    const backendBaseUrl = 'https://jetbra.novitechie.com'
+function arrayBufferToBase64(buffer) {
+    return btoa([...new Uint8Array(buffer)].map(b => String.fromCharCode(b)).join(''));
+}
+
+function base64ToArrayBuffer(base64) {
+    return Uint8Array.from(atob(base64), c => c.charCodeAt(0)).buffer;
+}
+
+function genLicenseId() {
+    const CHARSET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+    return Array.from({length: 10}, () => {
+        let idx = Math.floor(Math.random() * CHARSET.length);
+        return CHARSET[idx];
+    }).join('');
+}
+
+function buildLicensePartJson(pluginCode, licenseId) {
+    return JSON.stringify({
+        "licenseId": licenseId,
+        "licenseeName": "reborn",
+        "assigneeName": "reborn",
+        "assigneeEmail": "",
+        "licenseRestriction": "",
+        "checkConcurrentUse": false,
+        "products": [{
+            "code": pluginCode,
+            "fallbackDate": "2026-12-30",
+            "paidUpTo": "2026-12-30",
+            "extended": false
+        }],
+        "metadata": "0120230102PPAA013009",
+        "hash": "41472961/0:1563609451",
+        "gracePeriodDays": 7,
+        "autoProlongated": true,
+        "isAutoProlongated": true
+    })
+}
+
+async function addButton() {
+    injectStyles();
 
     let url = window.location.href
     if (!url.startsWith('https://plugins.jetbrains.com/plugin/')) {
@@ -78,43 +191,25 @@ let addButton = async function () {
             window.alert('This plugin is not a paid plugin in the market');
             return;
         }
-        let data = {
-            "licenseeName": "reborn",
-            "assigneeName": "reborn",
-            "assigneeEmail": "",
-            "licenseRestriction": "",
-            "checkConcurrentUse": false,
-            "products": [{
-                "code": pluginDetail.purchaseInfo.productCode,
-                "fallbackDate": "2026-12-30",
-                "paidUpTo": "2026-12-30",
-                "extended": false
-            }],
-            "metadata": "0120230102PPAA013009",
-            "hash": "41472961/0:1563609451",
-            "gracePeriodDays": 7,
-            "autoProlongated": true,
-            "isAutoProlongated": true
-        }
-        GM_xmlhttpRequest({
-            method: 'POST',
-            url: backendBaseUrl + '/generateLicense',
-            headers: {
-                'Content-Type': 'application/json'
-            },
-            data: JSON.stringify(data),
-            onload: function (response) {
-                let license = JSON.parse(response.responseText).license
-                GM_setClipboard(license, 'text');
-                window.alert('The activation code has been copied to your clipboard');
-            }
-        });
+        let licenseId = genLicenseId()
+        let licensePartJson = buildLicensePartJson(pluginDetail.purchaseInfo.productCode, licenseId)
+
+        let privateKey = await window.crypto.subtle.importKey("pkcs8", base64ToArrayBuffer(pem2base64(pemEncodedKey)), {
+            name: "RSASSA-PKCS1-v1_5", hash: "SHA-1",
+        }, true, ["sign"]);
+
+        let licensePartBase64 = btoa(unescape(encodeURIComponent(licensePartJson)));
+        let sigResultsBase64 = arrayBufferToBase64(await window.crypto.subtle.sign("RSASSA-PKCS1-v1_5", privateKey, new TextEncoder().encode(licensePartJson)));
+        let cert_base64 = pem2base64(pemEncodedCrt);
+
+        GM_setClipboard(`${licenseId}-${licensePartBase64}-${sigResultsBase64}-${cert_base64}`, 'text');
+        window.alert('The activation code has been copied to your clipboard');
     })
-};
+}
 
 addButton();
 if (window.onurlchange === null) {
-    window.addEventListener('urlchange', (info) => {
+    window.addEventListener('urlchange', (ignore) => {
         addButton();
     });
-}
\ No newline at end of file
+}