diff --git a/app/models/setting.rb b/app/models/setting.rb
index 1a52ebe60..8e1504bf3 100644
--- a/app/models/setting.rb
+++ b/app/models/setting.rb
@@ -1,4 +1,7 @@
 class Setting < ActiveRecord::Base
+
+  validates :key, presence: true, uniqueness: true
+
   default_scope { order(key: :desc) }
 
   def self.value_for(key)