diff --git a/types/stocks/index.d.ts b/types/stocks/index.d.ts
index 3d9b378..d820187 100644
--- a/types/stocks/index.d.ts
+++ b/types/stocks/index.d.ts
@@ -4,12 +4,12 @@ export interface StockApi {
   /**
    * 构造函数
    */
-  new();
+  new(): StockApi;
 
   /**
    * 构造函数
    */
-  constructor();
+  constructor(): StockApi;
 
   /**
    * 获取股票数据