diff --git a/lib/ui/grid/grid.js b/lib/ui/grid/grid.js
index bb65d79..262d835 100644
--- a/lib/ui/grid/grid.js
+++ b/lib/ui/grid/grid.js
@@ -67,7 +67,7 @@ let r = lang;
 /**
  * 键值字典
  * @template T
- * @typedef {{[key: string]: T}} KeyMap
+ * @typedef {Map<string, T>} KeyMap
  */
 
 /**