diff --git a/Netch/Models/Trojan.cs b/Netch/Models/Trojan.cs
index 8859d62b..ccc7662e 100644
--- a/Netch/Models/Trojan.cs
+++ b/Netch/Models/Trojan.cs
@@ -54,7 +54,7 @@ namespace Netch.Models
         public string cert;
         public string cipher = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:AES128-SHA:AES256-SHA:DES-CBC3-SHA";
         public string cipher_tls13 = "TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384";
-        public string sni;
+        public string sni = string.Empty;
         public List<string> alpn = new List<string>()
         {
             "h2",