diff --git a/app/services/users/apply_professional_auth_service.rb b/app/services/users/apply_professional_auth_service.rb
index 07afe18ae..a920caf55 100644
--- a/app/services/users/apply_professional_auth_service.rb
+++ b/app/services/users/apply_professional_auth_service.rb
@@ -38,7 +38,11 @@ class Users::ApplyProfessionalAuthService < ApplicationService
 
       move_image_file! unless params[:upload_image].to_s == 'false'
 
-      sms_notify_admin
+      sms_cache = Rails.cache.read("apply_pro_certification")
+      if sms_cache.nil?
+        sms_notify_admin
+        Rails.cache.write("apply_pro_certification", 1)
+      end
     end
   end