diff --git a/sysmaster.spec b/sysmaster.spec
index 80324c6..80ad844 100644
--- a/sysmaster.spec
+++ b/sysmaster.spec
@@ -16,7 +16,7 @@
 
 Name:           sysmaster 
 Version:        0.5.1
-Release:        4
+Release:        5
 Summary:        redesign and reimplement process1.
 
 License:        Mulan PSL v2
@@ -83,6 +83,10 @@ Summary:        %{summary}
 %package -n devmaster
 Summary:        Infrastructure of device management in userspace.
 BuildRequires:  util-linux-devel kmod-devel
+Requires:       %{name}%{?_isa} = %{version}-%{release}
+Requires(post):   sysmaster
+Requires(preun):  sysmaster
+Requires(postun): sysmaster
 
 %description -n devmaster
 This package provides the infrastructure of device management in userspace.
@@ -216,14 +220,18 @@ ln -s /usr/lib/sysmaster/system/sshd.service %{buildroot}/etc/sysmaster/system/m
 /etc/sysmaster/system/sysinit.target.wants/devctl-trigger.service
 
 %post -n devmaster
-test -f /etc/sysmaster/system/sysinit.target.wants/udevd.service && unlink /etc/sysmaster/system/sysinit.target.wants/udevd.service
-test -f /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service && unlink /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service
+test -f /etc/sysmaster/system/sysinit.target.wants/udevd.service && unlink /etc/sysmaster/system/sysinit.target.wants/udevd.service || :
+test -f /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service && unlink /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service || :
 
 %postun -n devmaster
-test -f /usr/lib/sysmaster/system/udevd.service && ln -s /usr/lib/sysmaster/system/udevd.service /etc/sysmaster/system/sysinit.target.wants/udevd.service
-test -f /usr/lib/sysmaster/system/udev-trigger.service && ln -s /usr/lib/sysmaster/system/udev-trigger.service /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service
+test -f /usr/lib/sysmaster/system/udevd.service && ln -s /usr/lib/sysmaster/system/udevd.service /etc/sysmaster/system/sysinit.target.wants/udevd.service || :
+test -f /usr/lib/sysmaster/system/udev-trigger.service && ln -s /usr/lib/sysmaster/system/udev-trigger.service /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service || :
 
 %changelog
+* Thu Dec 7 2023 chenjiayi<chenjiayi22@huawei.com> - 0.5.1-5
+- complement dependency from devmaster to sysmaster and avoid
+  exit with failure in post and postun process
+
 * Wed Dec 6 2023 chenjiayi<chenjiayi22@huawei.com> - 0.5.1-4
 - sync patches from upstream