diff --git a/ntp.spec b/ntp.spec
index 3fdd29a8f37be96faf28c5b74beedc9f696983af..e9625910dcad71290fc08c293b2424b7bc976be9 100644
--- a/ntp.spec
+++ b/ntp.spec
@@ -2,7 +2,7 @@
 
 Name:                  ntp
 Version:               4.2.8p15
-Release:               12
+Release:               13
 Summary:               A protocol designed to synchronize the clocks of computers over a network
 License:               MIT and BSD and BSD with advertising
 URL:                   https://www.ntp.org/
@@ -214,6 +214,12 @@ make check
 %{_mandir}/man8/*.8*
 
 %changelog
+* Fri Nov 24 2023 chengyechun <chengyechun1@huawei.com> - 4.2.8p15-13
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:update ntpd.service
+
 * Wed Jul 12 2023 chengyechun <chengyechun1@huawei.com> - 4.2.8p15-12
 - Type:bugfix
 - ID:NA
diff --git a/ntpd.service b/ntpd.service
index 22e39fee55138597573363b37b724f42344d30a1..61dee04c70ab0cdab3606a54ea3a4bf0ff35776d 100644
--- a/ntpd.service
+++ b/ntpd.service
@@ -1,7 +1,7 @@
 [Unit]
 Description=Network Time Service
 After=syslog.target ntpdate.service sntp.service
-Conflicts=systemd-timesyncd.service chronyd.service
+Conflicts=chronyd.service systemd-timesyncd.service
 
 [Service]
 Type=forking