diff --git a/app/models/channel/web_widget.rb b/app/models/channel/web_widget.rb
index faa1126f3..1b778b22f 100644
--- a/app/models/channel/web_widget.rb
+++ b/app/models/channel/web_widget.rb
@@ -41,6 +41,7 @@ class Channel::WebWidget < ApplicationRecord
   before_validation :validate_pre_chat_options
   validates :website_url, presence: true
   validates :widget_color, presence: true
+  validates :welcome_tagline, length: { maximum: 600 }
   has_many :portals, foreign_key: 'channel_web_widget_id', dependent: :nullify, inverse_of: :channel_web_widget
 
   has_secure_token :website_token