diff --git a/src/vision/interfaces.ts b/src/vision/interfaces.ts
index f098256..63b5516 100644
--- a/src/vision/interfaces.ts
+++ b/src/vision/interfaces.ts
@@ -1,5 +1,5 @@
 export interface VOCRParams {
-  prompt: string | string[];
+  prompt?: string | string[];
   url?: string;
   file_store_key?: string;
   page_range?: Array<number>;