diff --git a/host/JiShe.IoT.HttpApi.Host/Program.cs b/host/JiShe.IoT.HttpApi.Host/Program.cs
index 8fc4c84..edd39b1 100644
--- a/host/JiShe.IoT.HttpApi.Host/Program.cs
+++ b/host/JiShe.IoT.HttpApi.Host/Program.cs
@@ -35,7 +35,7 @@ public class Program
             await builder.AddApplicationAsync<JiShe.IoT.IoTHttpApiHostModule>();
             builder.WebHost.ConfigureKestrel((context, options) =>
             {
-                options.Limits.MaxRequestBodySize = 10 * 1024 * 1024; // 10MB
+                options.Limits.MaxRequestBodySize = 500 * 1024 * 1024; // 500MB null²»ÊÜÏÞÖÆ
                 options.Limits.KeepAliveTimeout = TimeSpan.FromMinutes(2);
                 options.Limits.RequestHeadersTimeout = TimeSpan.FromMinutes(1);
             });