diff --git a/be/app/Http/Resources/SubTaskResource.php b/be/app/Http/Resources/SubTaskResource.php
index aac6d2c..1e0439b 100644
--- a/be/app/Http/Resources/SubTaskResource.php
+++ b/be/app/Http/Resources/SubTaskResource.php
@@ -32,7 +32,7 @@ class SubTaskResource extends JsonResource
             'is_finished' => $this->is_finished,
             'timeblocks' => TimeblockResource::collection($this->timeblocks),
             'timesheets' => TimesheetResource::collection($this->timesheets),
-            'files' => AttachmentResource::collection($this->attachments),
+            'files' => AttachmentResource::collection($this->attachments ?: $this->mastertask->attachments),
             'color' => $this->mastertask->color,
         ];