diff --git a/app/controllers/schedules_controller.rb b/app/controllers/schedules_controller.rb
index db55185..1af0ea1 100644
--- a/app/controllers/schedules_controller.rb
+++ b/app/controllers/schedules_controller.rb
@@ -49,7 +49,7 @@ class SchedulesController < ApplicationController
   def schedule_edit_update
     error_messages = []
 
-    params[:schedule].each do |id, attributes|
+    params[:schedule]&.each do |id, attributes|
       schedule = Schedule.find_by(id: id)
       next unless schedule