diff --git a/app/models/memo.rb b/app/models/memo.rb
index f74f4c396..aa0af8a02 100644
--- a/app/models/memo.rb
+++ b/app/models/memo.rb
@@ -20,7 +20,7 @@ class Memo < ApplicationRecord
 	validates_presence_of :author_id, :subject,:content
 	# 若是主题帖，则内容可以是空
 	#validates :content, presence: true, if: Proc.new{|o| !o.parent_id.nil? }
-	validates_length_of :subject, maximum: 50
+	validates_length_of :subject, maximum: 200
 
   validate :cannot_reply_to_locked_topic, :on => :create