diff --git a/nonebot_plugin_llmchat/config.py b/nonebot_plugin_llmchat/config.py
index bbb1f66..6b02ac2 100644
--- a/nonebot_plugin_llmchat/config.py
+++ b/nonebot_plugin_llmchat/config.py
@@ -10,7 +10,7 @@ class PresetConfig(BaseModel):
     model_name: str = Field(..., description="模型名称")
     max_tokens: int = Field(2048, description="最大响应token数")
     temperature: float = Field(0.7, description="生成温度（0-2]")
-    proxy: str = Field(None, description="HTTP代理服务器")
+    proxy = Field(None, description="HTTP代理服务器")
 
 
 class ScopedConfig(BaseModel):