diff --git a/src/interface.ts b/src/interface.ts
index 79b33ab6..8b8f6ae5 100644
--- a/src/interface.ts
+++ b/src/interface.ts
@@ -22,7 +22,7 @@ export type TabOffsetMap = Map<React.Key, TabOffset>;
 export type TabPosition = 'left' | 'right' | 'top' | 'bottom';
 
 export interface Tab extends Omit<TabPaneProps, 'tab'> {
-  key: string;
+  key: React.Key;
   label: React.ReactNode;
 }