diff --git a/src/WWB.UnifyApi/Converter/LongToStringConverter.cs b/src/WWB.UnifyApi/Converter/LongToStringConverter.cs
new file mode 100644
index 0000000..15432cf
--- /dev/null
+++ b/src/WWB.UnifyApi/Converter/LongToStringConverter.cs
@@ -0,0 +1,50 @@
+using Newtonsoft.Json;
+using System;
+
+namespace WWB.UnifyApi.Converter
+{
+    public class LongToStringConverter : JsonConverter
+    {
+        /// <summary>
+        /// 是否开启自定义反序列化，值为true时，反序列化时会走ReadJson方法，值为false时，不走ReadJson方法，而是默认的反序列化
+        /// </summary>
+        public override bool CanRead => false;
+
+        /// <summary>
+        /// 是否开启自定义序列化，值为true时，序列化时会走WriteJson方法，值为false时，不走WriteJson方法，而是默认的序列化
+        /// 类型等于long时才转换
+        /// </summary>
+        /// <param name="objectType"></param>
+        /// <returns></returns>
+        public override bool CanConvert(Type objectType)
+        {
+            return objectType == typeof(long) || objectType == typeof(long?);
+        }
+
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue,
+            JsonSerializer serializer)
+        {
+            throw new NotImplementedException("Unnecessary because CanRead is false.The type will skip the converter.");
+        }
+
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            if (value == null)
+            {
+                writer.WriteNull();
+                return;
+            }
+
+            var cValue = value.ToString();
+            //长度大于等于19位的ID才返回String
+            if (cValue != null && (cValue.Length >= 15 || writer.Path.ToLower().Contains("id")))
+            {
+                writer.WriteValue(cValue);
+            }
+            else
+            {
+                writer.WriteValue(value);
+            }
+        }
+    }
+}
diff --git a/src/WWB.UnifyApi/WWB.UnifyApi.csproj b/src/WWB.UnifyApi/WWB.UnifyApi.csproj
index 471d407..9ef3b41 100644
--- a/src/WWB.UnifyApi/WWB.UnifyApi.csproj
+++ b/src/WWB.UnifyApi/WWB.UnifyApi.csproj
@@ -1,9 +1,9 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
 		<TargetFramework>netcoreapp3.1</TargetFramework>
 		<PackageId>WWB.UnifyApi</PackageId>
-		<Version>1.0.1</Version>
+		<Version>1.0.2</Version>
 		<Authors>my6521</Authors>
 		<Description>NetCore3.1</Description>
 		<PackageLicenseExpression>MIT</PackageLicenseExpression>
@@ -13,5 +13,6 @@
 
 	<ItemGroup>
 		<PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.2.5" />
+		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
 	</ItemGroup>
 </Project>
\ No newline at end of file