diff --git a/FastGithub.Core/DomainConfig.cs b/FastGithub.Core/DomainConfig.cs
index 5c6ab09..7127059 100644
--- a/FastGithub.Core/DomainConfig.cs
+++ b/FastGithub.Core/DomainConfig.cs
@@ -12,6 +12,11 @@ namespace FastGithub
         /// </summary>
         public bool TlsSni { get; set; }
 
+        /// <summary>
+        /// 请求超时时长
+        /// </summary>
+        public TimeSpan? Timeout { get; set; }
+
         /// <summary>
         /// 目的地
         /// 格式为相对或绝对uri
diff --git a/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs b/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
index fd974b4..6e52e51 100644
--- a/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
+++ b/FastGithub.ReverseProxy/ReverseProxyMiddleware.cs
@@ -47,11 +47,13 @@ namespace FastGithub.ReverseProxy
             }
 
             var destinationPrefix = GetDestinationPrefix(host, domainConfig.Destination);
+            var requestConfig = new ForwarderRequestConfig { Timeout = domainConfig.Timeout };
+
             var httpClient = domainConfig.TlsSni
                ? new HttpMessageInvoker(this.sniHttpClientHanlder, disposeHandler: false)
                : new HttpMessageInvoker(this.noSniHttpClientHanlder, disposeHandler: false);
 
-            var error = await httpForwarder.SendAsync(context, destinationPrefix, httpClient);
+            var error = await httpForwarder.SendAsync(context, destinationPrefix, httpClient, requestConfig);
             await ResponseErrorAsync(context, error);
         }
 
diff --git a/FastGithub/appsettings.json b/FastGithub/appsettings.json
index c13e35a..0020d7f 100644
--- a/FastGithub/appsettings.json
+++ b/FastGithub/appsettings.json
@@ -8,38 +8,32 @@
       "IPAddress": "114.114.114.114",
       "Port": 53
     },
-    "DomainConfigs": { // ������*��ʾ0����������ַ�
+    "DomainConfigs": { // ������*��ʾ0����������ַ� 
       "github.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false, // ָʾtls����ʱ�Ƿ���SNI��Ĭ��Ϊfalse,
+        "Timeout": null, // ����ʱʱ������ʽΪ"00:02:00"��Ĭ��Ϊnull
+        "Destination": null // ����Ŀ�ĵأ���ʽΪ���Ի����Uri��Ĭ��null
       },
       "githubstatus.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*.github.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*.github.io": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*.githubapp.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*.githubassets.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*.githubusercontent.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "*github*.s3.amazonaws.com": {
-        "TlsSni": false,
-        "Destination": null
+        "TlsSni": false
       },
       "ajax.googleapis.com": {
         "TlsSni": true,
diff --git a/README.md b/README.md
index 8d97cfa..e214a1a 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@ github加速神器
 ### 加速原理
 * 修改本机的dns服务指向FastGithub自身
 * 解析匹配的域名为FastGithub自身的ip
-* 请求信任的dns服务(dnscrypt-proxy)获取域名的ip并进行无SNI的https反向代理
+* 请求不受污染的dns服务(dnscrypt-proxy)获取域名的ip
+* 使用得到的ip进行无或有SNI的https反向代理
 
 ### 程序下载
 [下载最新发布版本](https://gitee.com/jiulang/fast-github)