diff --git a/lib/tasks/change_site_cert.rake b/lib/tasks/change_site_cert.rake
index 3a6fab6..f9cb279 100644
--- a/lib/tasks/change_site_cert.rake
+++ b/lib/tasks/change_site_cert.rake
@@ -37,7 +37,7 @@ namespace :create_site do
             domain_names = site_constructs.flat_map{|site_construct| site_construct.domain_name.strip.split(" ")}.select{|d| d.present? && d.match(/^[\d\.]+$/).nil?}
             domain_names = domain_names.select{|d| `dig #{d} +short`.split("\n").select{|s| s.strip == site_server.ip}.count != 0}
             if domain_names.count != 0
-              certbot_path = exec_ssh_command_by_sudo_and_see_output(ssh,"bash -l -c 'which certbot certbot-auto'",false,true).strip.split("\n")[0]
+              certbot_path = exec_ssh_command_by_sudo_and_see_output(ssh,"bash -l -c 'which certbot certbot-auto'",false,true).strip.split("\n")[0].strip()
               if certbot_path.present?
                 auto_update_infos("Using certbot to update cert setting...")
                 if site_constructs.count > 1