diff --git a/app/models/course_second_category.rb b/app/models/course_second_category.rb
index 125a81cb6..630b74807 100644
--- a/app/models/course_second_category.rb
+++ b/app/models/course_second_category.rb
@@ -5,7 +5,7 @@ class CourseSecondCategory < ApplicationRecord
   belongs_to :course_module
   has_many :homework_commons
 
-  validates :name, length: { maximum: 30 }
+  validates :name, length: { maximum: 60 }
 
   def category_type_str
     category_type == "graduation" && name == "毕设选题" ? "graduation_topics" : (