diff --git a/script.js b/script.js
index fbb06e0..f7b41cc 100644
--- a/script.js
+++ b/script.js
@@ -1,3 +1,5 @@
+// GitHub repository URL: https://github.com/xixu-me/MCO
+
 const domesticNameservers = [
     "https://dns.alidns.com/dns-query",
     "https://doh.pub/dns-query",