diff --git a/index.d.ts b/index.d.ts
index f86cfd11..8f549b38 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -21,6 +21,7 @@ declare namespace Ffmpeg {
         timeout?: number | undefined;
         source?: string | stream.Readable | undefined;
         cwd?: string | undefined;
+        signal?: AbortSignal | undefined; // an AbortSignal to cancel the command
     }
 
     interface FilterSpecification {