diff --git a/app/Ninja/Repositories/InvoiceRepository.php b/app/Ninja/Repositories/InvoiceRepository.php
index aed41f0826ec..53e7f9eba93c 100644
--- a/app/Ninja/Repositories/InvoiceRepository.php
+++ b/app/Ninja/Repositories/InvoiceRepository.php
@@ -1212,7 +1212,7 @@ class InvoiceRepository extends BaseRepository
         $frequencyId = $settings->frequency_id_reminder4;
 
         if (! $frequencyId || ! $account->enable_reminder4) {
-            return [];
+            return collect();
         }
 
         $frequency = Utils::getFromCache($frequencyId, 'frequencies');