diff --git a/Communications/SimApiBaseRequest.cs b/Communications/SimApiBaseRequest.cs
index f4c6670..5d25ac7 100644
--- a/Communications/SimApiBaseRequest.cs
+++ b/Communications/SimApiBaseRequest.cs
@@ -1,13 +1,11 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace SimApi.Communications;
+namespace SimApi.Communications;
 
 /// <summary>
 /// 只有ID的请求
 /// </summary>
 public class SimApiIdOnlyRequest
 {
-    [Required] public int Id { get; set; }
+    public required int Id { get; set; }
 }
 
 /// <summary>
@@ -15,7 +13,7 @@ public class SimApiIdOnlyRequest
 /// </summary>
 public class SimApiStringIdOnlyRequest
 {
-    [Required] public string? Id { get; set; }
+    public required string Id { get; set; }
 }
 
 /// <summary>
@@ -24,7 +22,7 @@ public class SimApiStringIdOnlyRequest
 /// <typeparam name="T"></typeparam>
 public class SimApiOneFieldRequest<T>
 {
-    [Required] public T? Data { get; set; }
+    public required T Data { get; set; }
 }
 
 /// <summary>
@@ -32,6 +30,6 @@ public class SimApiOneFieldRequest<T>
 /// </summary>
 public class SimApiBasePageRequest
 {
-    [Required] public int Page { get; set; }
-    [Required] public int Count { get; set; }
+    public required int Page { get; set; }
+    public required int Count { get; set; }
 }
\ No newline at end of file
diff --git a/Communications/SimApiLoginItem.cs b/Communications/SimApiLoginItem.cs
index 12ac03e..963718e 100644
--- a/Communications/SimApiLoginItem.cs
+++ b/Communications/SimApiLoginItem.cs
@@ -9,6 +9,6 @@ public class SimApiLoginItem
 {
     public string Id { get; set; } = null!;
     public string[] Type { get; set; } = ["user"];
-    public Dictionary<string, string> Meta { get; set; } = new();
+    public Dictionary<string, string> Meta { get; set; } = [];
     public object? Extra { get; set; }
 };
\ No newline at end of file
diff --git a/SimApi.csproj b/SimApi.csproj
index 91d4719..f515b53 100644
--- a/SimApi.csproj
+++ b/SimApi.csproj
@@ -31,6 +31,7 @@
         <PackageReference Include="MQTTnet" Version="5.0.1.1416" />
         <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="8.1.1" />
         <PackageReference Include="Swashbuckle.AspNetCore.SwaggerUI" Version="8.1.1" />
+        <PackageReference Include="System.Text.Json" Version="9.0.10" />
     </ItemGroup>
     <ProjectExtensions>
         <MonoDevelop>