diff --git a/app/models/dictionary.rb b/app/models/dictionary.rb
index 92fdb94..2314e61 100644
--- a/app/models/dictionary.rb
+++ b/app/models/dictionary.rb
@@ -11,8 +11,8 @@ class Dictionary < ApplicationRecord
   # == Relationships ========================================================
 
   # == Validations ==========================================================
-  validates :name, presence: true, length: { maximum: 255 }
-  validates :shortcut, presence: true, length: { maximum: 50 }
+  validates :name, presence: true, length: { maximum: 255 }, uniqueness: true
+  validates :shortcut, presence: true, length: { maximum: 50 }, uniqueness: true
   validates :description, presence: true, length: { maximum: 1000 }
   # == Scopes ===============================================================
   scope :by_short, ->(val) { where(shortcut: val) }