diff --git a/@types/input-number.d.ts b/@types/input-number.d.ts
index b17441a10..de8aec76b 100644
--- a/@types/input-number.d.ts
+++ b/@types/input-number.d.ts
@@ -24,7 +24,7 @@ export interface AtInputNumberProps extends AtComponent{
 
   onChange: (value: number) => void
 
-  onBlur: CommonEventFunction
+  onBlur?: CommonEventFunction
 }
 
 declare const AtInputNumber: ComponentClass<AtInputNumberProps>