diff --git a/src/main/java/com/example/daemawiki/domain/file/api/FileController.java b/src/main/java/com/example/daemawiki/domain/file/api/FileController.java
index 5af3573e..df29df8a 100644
--- a/src/main/java/com/example/daemawiki/domain/file/api/FileController.java
+++ b/src/main/java/com/example/daemawiki/domain/file/api/FileController.java
@@ -28,7 +28,7 @@ public FileController(S3UploadObject s3UploadObject, S3DeleteObject s3DeleteObje
     }
 
     @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
-    public Mono<File> uploadFile(@RequestPart(value = "file", required = true) FilePart filePart, @RequestParam("type") String fileType) {
+    public Mono<File> uploadFile(@RequestPart(value = "file", required = true) FilePart filePart, @NotBlank @RequestParam("type") String fileType) {
         return s3UploadObject.uploadObject(filePart, fileType);
     }