diff --git a/app/models/user.rb b/app/models/user.rb
index b9a5617a..feb6240d 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -26,6 +26,8 @@ class User < ActiveRecord::Base
 
   validates :screen_name, presence: true, format: { with: SCREEN_NAME_REGEX }, uniqueness: { case_sensitive: false }
 
+  validates :display_name, length: { maximum: 50 }
+
   # validates :website, format: { with: WEBSITE_REGEX }
 
   def login=(login)