diff --git a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
index 307806ce..29a888fa 100644
--- a/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
+++ b/shadowsocks-csharp/Controller/Service/UpdateChecker.cs
@@ -15,7 +15,7 @@ namespace Shadowsocks.Controller
         private static Logger logger = LogManager.GetCurrentClassLogger();
 
         private const string UpdateURL = "https://api.github.com/repos/shadowsocks/shadowsocks-windows/releases";
-        private const string UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36";
+        private const string UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36";
 
         private Configuration config;
         public bool NewVersionFound;
diff --git a/shadowsocks-csharp/Proxy/HttpProxy.cs b/shadowsocks-csharp/Proxy/HttpProxy.cs
index 36827c8c..dd13b779 100644
--- a/shadowsocks-csharp/Proxy/HttpProxy.cs
+++ b/shadowsocks-csharp/Proxy/HttpProxy.cs
@@ -70,7 +70,7 @@ namespace Shadowsocks.Proxy
             "CONNECT {0} HTTP/1.1" + HTTP_CRLF + 
             "Host: {0}" + HTTP_CRLF +
             "Proxy-Connection: keep-alive" + HTTP_CRLF +
-            "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36" + HTTP_CRLF +
+            "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36" + HTTP_CRLF +
             "{1}" +         // Proxy-Authorization if any
             "" + HTTP_CRLF; // End with an empty line
         private const string PROXY_AUTH_TEMPLATE = "Proxy-Authorization: Basic {0}" + HTTP_CRLF;