diff --git a/app/controllers/hacks_controller.rb b/app/controllers/hacks_controller.rb
index 2b4c1e847..70f5b5001 100644
--- a/app/controllers/hacks_controller.rb
+++ b/app/controllers/hacks_controller.rb
@@ -194,7 +194,7 @@ class HacksController < ApplicationController
   end
 
   def hack_params
-    params.require(:hack).permit(:name, :description, :difficult, :category, :open_or_not, :time_limit, :score, :sub_discipline_id)
+    params.require(:hack).permit(:name, :description, :difficult, :open_or_not, :time_limit, :score, :sub_discipline_id)
   end
 
   def item_params