diff --git a/typings/index.d.ts b/typings/index.d.ts
index 71f9eb7..0760039 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -14,6 +14,7 @@ export interface FFmpegInfo {
   command: string;
   info: string;
   version: string;
+  output: string;
 }
 
 export class FFmpeg extends Duplex {