diff --git a/src/main/java/everymeal/server/user/controller/UserController.java b/src/main/java/everymeal/server/user/controller/UserController.java
index 3cd29a0..1446f24 100644
--- a/src/main/java/everymeal/server/user/controller/UserController.java
+++ b/src/main/java/everymeal/server/user/controller/UserController.java
@@ -26,7 +26,7 @@ public ApplicationResponse<Boolean> signUp(
             @RequestBody
                     @Schema(
                             description = "유저의 기기 고유 번호",
-                            defaultValue = "1234567890",
+                            defaultValue = "123456789",
                             example = "1234567890")
                     String userDeviceId) {
         return ApplicationResponse.ok(userService.signUp(userDeviceId));