diff --git a/FastGithub.Scanner/ScanMiddlewares/TcpScanOptions.cs b/FastGithub.Scanner/ScanMiddlewares/TcpScanOptions.cs
index 646eb06..bb26fd5 100644
--- a/FastGithub.Scanner/ScanMiddlewares/TcpScanOptions.cs
+++ b/FastGithub.Scanner/ScanMiddlewares/TcpScanOptions.cs
@@ -16,6 +16,6 @@ namespace FastGithub.Scanner.ScanMiddlewares
         /// <summary>
         /// 扫描结果缓存时长
         /// </summary>
-        public TimeSpan CacheExpiration { get; set; } = TimeSpan.FromMinutes(20d);
+        public TimeSpan CacheExpiration { get; set; } = TimeSpan.FromMinutes(30d);
     }
 }
diff --git a/FastGithub/appsettings.json b/FastGithub/appsettings.json
index a624087..f2b148c 100644
--- a/FastGithub/appsettings.json
+++ b/FastGithub/appsettings.json
@@ -9,7 +9,7 @@
       "ResultScanInterval": "00:01:00", // ���ɨ��ʱ����
       "TcpScan": {
         "Timeout": "00:00:01", // tcpɨ�賬ʱʱ��
-        "CacheExpiration": "00:20:00" // ɨ��������ʱ��
+        "CacheExpiration": "00:30:00" // ɨ��������ʱ��
       },
       "HttpsScan": {
         "Timeout": "00:00:05", // httpsɨ�賬ʱʱ��