diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 0a058f4cc..a7d874805 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -72,7 +72,7 @@ class Attachment < ApplicationRecord
   scope :unified_setting, -> {where("unified_setting = ? ", 1)}
   scope :where_id_or_uuid, -> (id) { (Float(id) rescue nil).present? ? where(id: id) : where(uuid: id) }
 
-  validates_length_of :description, maximum: 255, message: "不能超过100个字符"
+  validates_length_of :description, maximum: 255, message: "不能超过255个字符"
 
   DCODES = %W(2 3 4 5 6 7 8 9 a b c f e f g h i j k l m n o p q r s t u v w x y z)