diff --git a/app/models/competition_module.rb b/app/models/competition_module.rb
index 3fdab6b37..3b1bfddda 100644
--- a/app/models/competition_module.rb
+++ b/app/models/competition_module.rb
@@ -3,7 +3,7 @@ class CompetitionModule < ApplicationRecord
 
   belongs_to :competition
 
-  has_one :competition_module_md_content, dependent: :destroy
+  has_many :competition_module_md_contents, dependent: :destroy
 
   def module_url
     result_url = url.present? ? url : case module_type
diff --git a/app/views/competitions/competition_modules/show.json.jbuilder b/app/views/competitions/competition_modules/show.json.jbuilder
index 116934ee8..14c3c0f57 100644
--- a/app/views/competitions/competition_modules/show.json.jbuilder
+++ b/app/views/competitions/competition_modules/show.json.jbuilder
@@ -1,6 +1,6 @@
 json.extract! @module, :id, :name, :position, :url
 
-md = @module.competition_module_md_content
+md = @module.competition_module_md_contents.take
 if md.present?
   json.md_id md.id
   json.md_name md.name