diff --git a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
index 390018dd..4ed3bf96 100644
--- a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
+++ b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application.Contracts/Dtos/OpenAi/ThorChatCompletionsRequest.cs
@@ -32,7 +32,7 @@ public class ThorChatCompletionsRequest
     /// 包含迄今为止对话的消息列表
     /// </summary>
     [JsonPropertyName("messages")]
-    public List<ThorChatMessage> Messages { get; set; }
+    public List<ThorChatMessage>? Messages { get; set; }
 
     /// <summary>
     /// 模型唯一编码值，如 gpt-4，gpt-3.5-turbo,moonshot-v1-8k，看底层具体平台定义