diff --git a/app/controllers/private_controller.rb b/app/controllers/private_controller.rb
index 7666a40..68b859f 100644
--- a/app/controllers/private_controller.rb
+++ b/app/controllers/private_controller.rb
@@ -1,37 +1,39 @@
 class PrivateController < ApplicationController
   # This a private trusted API
   skip_before_action :verify_authenticity_token
 
   # PUT /replace_ds
   def replace_ds
     parent, child, ds = replace_ds_params.values_at(:parent, :child, :ds)
     Domain.replace_ds(parent, child, ds)
 
     render json: { ok: true }
+  rescue ActiveRecord::RecordNotFound
+    render json: { ok: false, msg: 'Domain not found!' }
   end
 
   # PUT /trigger_event
   def trigger_event
     result = Domain
              .find_by_name(action_params[:domain])
              .fire_state_event(action_params[:event], params[:args])
     render json: { ok: result }
   end
 
   private
 
   def action_params
     params.require(:domain)
     params.require(:event)
     params.permit(:domain, :event, args: [])
   end
 
   def replace_ds_params
     params.require(:parent)
     params.require(:child)
     params.require(:ds)
     params.permit(ds: [])
 
     params
   end
 end