diff --git a/src/services/attendee/attendee-schema.ts b/src/services/attendee/attendee-schema.ts
index e0069dd..2f4a201 100644
--- a/src/services/attendee/attendee-schema.ts
+++ b/src/services/attendee/attendee-schema.ts
@@ -95,5 +95,7 @@ export const PartialAttendeeValidator = AttendeeValidator.partial();
 
 export const AttendeeFilterValidator = z.object({
     in: PartialAttendeeValidator,
-    out: z.map(PartialAttendeeValidator.keyof(), z.number().min(0).max(1)),
+    out: z.array(
+        z.record(PartialAttendeeValidator.keyof(), z.number().min(0).max(1))
+    ),
 });