diff --git a/app/models/homework_common.rb b/app/models/homework_common.rb
index 5f5808944..9aa4a8fe1 100644
--- a/app/models/homework_common.rb
+++ b/app/models/homework_common.rb
@@ -35,7 +35,7 @@ class HomeworkCommon < ApplicationRecord
   has_many :homework_review_results, :dependent => :destroy
 
   validates :name, length: { maximum: 60 }
-  validates :description, length: { maximum: 10000 }
+  validates :description, length: { maximum: 15000 }
   validates :reference_answer, length: { maximum: 5000 }
 
   # after_update :update_activity