diff --git a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageContent.cs b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageContent.cs
index ae6ecc04..df23aa72 100644
--- a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageContent.cs
+++ b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Anthropic/AnthropicMessageContent.cs
@@ -20,6 +20,8 @@ public class AnthropicMessageContent
 
     [JsonPropertyName("thinking")] public string? Thinking { get; set; }
     
+    [JsonPropertyName("signature")] public string? Signature { get; set; }
+    
     [JsonPropertyName("input")] public object? Input { get; set; }
 
     [JsonPropertyName("content")]