diff --git a/_worker.js b/_worker.js
index f739dae..2a6289d 100644
--- a/_worker.js
+++ b/_worker.js
@@ -11,7 +11,9 @@ export default {
         const 管理员密码 = env.ADMIN || env.admin || env.PASSWORD || env.password || env.pswd || env.TOKEN || env.KEY;
         const 加密秘钥 = env.KEY || '勿动此默认密钥，有需求请自行通过添加变量KEY进行修改';
         const userIDMD5 = await MD5MD5(管理员密码 + 加密秘钥);
-        const userID = env.UUID || env.uuid || [userIDMD5.slice(0, 8), userIDMD5.slice(8, 12), '4' + userIDMD5.slice(13, 16), userIDMD5.slice(16, 20), userIDMD5.slice(20)].join('-');
+        const uuidRegex = /^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}$/;
+        const envUUID = env.UUID || env.uuid;
+        const userID = (envUUID && uuidRegex.test(envUUID)) ? envUUID.toLowerCase() : [userIDMD5.slice(0, 8), userIDMD5.slice(8, 12), '4' + userIDMD5.slice(13, 16), userIDMD5.slice(16, 20), userIDMD5.slice(20)].join('-');
         if (env.PROXYIP) {
             const proxyIPs = await 整理成数组(env.PROXYIP);
             反代IP = proxyIPs[Math.floor(Math.random() * proxyIPs.length)];