diff --git a/index.d.ts b/index.d.ts
index 16c9fcdb8..d6c000899 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -447,7 +447,7 @@ declare namespace Bull {
           /**
            * The key for the repeatable job metadata in Redis.
            */
-          readonly key: string;
+          readonly key?: string;
         })
       | undefined;