diff --git a/src/main/java/hello/cluebackend/presentation/api/submission/SubmissionCommandController.java b/src/main/java/hello/cluebackend/presentation/api/submission/SubmissionCommandController.java
index 03332ee..c708a68 100644
--- a/src/main/java/hello/cluebackend/presentation/api/submission/SubmissionCommandController.java
+++ b/src/main/java/hello/cluebackend/presentation/api/submission/SubmissionCommandController.java
@@ -74,7 +74,6 @@ public ResponseEntity<Resource> submissionAttachmentDownload(
 
     return ResponseEntity.ok()
             .contentType(mediaType)
-            .contentLength(resource.contentLength())
             .header(HttpHeaders.CONTENT_DISPOSITION, ContentDisposition.attachment()
                     .filename(original, StandardCharsets.UTF_8)
                     .build()