diff --git a/app/assets/javascripts/app/controllers/_ui_element/ticket_perform_action.coffee b/app/assets/javascripts/app/controllers/_ui_element/ticket_perform_action.coffee
index c5718de48..d49e7b6db 100644
--- a/app/assets/javascripts/app/controllers/_ui_element/ticket_perform_action.coffee
+++ b/app/assets/javascripts/app/controllers/_ui_element/ticket_perform_action.coffee
@@ -350,7 +350,7 @@ class App.UiElement.ticket_perform_action
     notificationElement.find('.js-body div[contenteditable="true"]').ce(
       mode: 'richtext'
       placeholder: 'message'
-      maxlength: 2000
+      maxlength: 20000
     )
     new App.WidgetPlaceholder(
       el: notificationElement.find('.js-body div[contenteditable="true"]').parent()