diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts b/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts
index 9d244882..109130ff 100644
--- a/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts
@@ -5,6 +5,8 @@ export enum FileType {
   Video = 'V',
   // F : 파일
   File = 'F',
+  // S : 사운드파일
+  Sound = 'S',
   // "" 빈값이면 모든 타입을 내려줌
   All = ''
 }