diff --git a/app/services/modbus/polling_service.rb b/app/services/modbus/polling_service.rb
index f4bbc60..c86401c 100644
--- a/app/services/modbus/polling_service.rb
+++ b/app/services/modbus/polling_service.rb
@@ -7,7 +7,7 @@ module Modbus
       def start
         return if @scheduler
 
-        puts "[#{Time.current}] Modbus polling service 시작됨 (Rufus)"
+        puts "[#{Time.now}] Modbus polling service 시작됨 (Rufus)"
         @scheduler ||= Rufus::Scheduler.new
 
         @scheduler.cron "0 * * * * *" do
@@ -23,9 +23,9 @@ module Modbus
         if defined?(@scheduler)
           @scheduler.shutdown(:kill)
           @scheduler = nil
-          puts "[#{Time.current}] Modbus polling service 중지됨"
+          puts "[#{Time.now}] Modbus polling service 중지됨"
         else
-          puts "[#{Time.current}] Scheduler 인스턴스 없음"
+          puts "[#{Time.now}] Scheduler 인스턴스 없음"
         end
       end
 
@@ -52,7 +52,7 @@ module Modbus
         if system("ruby", path.to_s, arg)
           puts success_msg
         else
-          puts "[#{Time.current}] #{file} 실행 실패 (args: #{arg})"
+          puts "[#{Time.now}] #{file} 실행 실패 (args: #{arg})"
         end
       end
     end