diff --git a/projects/Infrastructure/Web/BaseStartup.cs b/projects/Infrastructure/Web/BaseStartup.cs
index 80a4c74e..48171c82 100644
--- a/projects/Infrastructure/Web/BaseStartup.cs
+++ b/projects/Infrastructure/Web/BaseStartup.cs
@@ -35,7 +35,6 @@ using Microsoft.IdentityModel.Tokens;
 using Microsoft.OpenApi.Models;
 using Newtonsoft.Json;
 using System;
-using System.Buffers;
 using System.Globalization;
 using System.IO;
 using System.Linq;
@@ -264,7 +263,11 @@ namespace Infrastructure.Web
                     {
                         OnTokenValidated = context =>
                         {
-                            if (DateTime.UtcNow > context.SecurityToken.ValidTo)
+                            if (context.SecurityToken == null)
+                            {
+                                context.Fail("token error");
+                            }
+                            else if (DateTime.UtcNow > context.SecurityToken.ValidTo)
                             {
                                 context.Fail("token time out");
                             }