diff --git a/SimApiExtensions.cs b/SimApiExtensions.cs
index e4b62f5..0a345a1 100644
--- a/SimApiExtensions.cs
+++ b/SimApiExtensions.cs
@@ -33,7 +33,7 @@ public static class SimApiExtensions
         // 是否使用 AUTH
         if (simApiOptions.EnableSimApiAuth)
         {
-            builder.AddScoped<SimApiAuth>();
+            builder.AddSingleton<SimApiAuth>();
         }
 
         if (simApiOptions.EnableCors)