diff --git a/src/main/java/dev/surl/surl/dto/UserDto.kt b/src/main/java/dev/surl/surl/dto/UserDto.kt
index 32ed805..6cff0dd 100644
--- a/src/main/java/dev/surl/surl/dto/UserDto.kt
+++ b/src/main/java/dev/surl/surl/dto/UserDto.kt
@@ -7,7 +7,7 @@ import org.hibernate.validator.constraints.Length
 /**
  * 用户信息请求体
  */
-data class UserDto (
+class UserDto (
     @JsonProperty("username")
     @get:Length(max = 16, min = 4, message = "username length must be between 4 and 16")
     @get:NotNull(message = "username cannot be null")