diff --git a/packages/artplayer/types/player.d.ts b/packages/artplayer/types/player.d.ts
index f31e4e857..6f74718ca 100644
--- a/packages/artplayer/types/player.d.ts
+++ b/packages/artplayer/types/player.d.ts
@@ -1,6 +1,6 @@
 import { CssVar } from './cssVar';
 
-export type AspectRatio = 'default' | '4:3' | '16:9' | (string & Record<never, never>);
+export type AspectRatio = 'default' | '4:3' | '16:9' | (`${number}:${number}` & Record<never, never>);
 export type PlaybackRate = 0.5 | 0.75 | 1.0 | 1.25 | 1.5 | 1.75 | 2.0 | (number & Record<never, never>);
 export type Flip = 'normal' | 'horizontal' | 'vertical' | (string & Record<never, never>);
 export type State = 'standard' | 'mini' | 'pip' | 'fullscreen' | 'fullscreenWeb';