diff --git a/trousers.spec b/trousers.spec
index 7d2c62f..b31cc66 100644
--- a/trousers.spec
+++ b/trousers.spec
@@ -1,6 +1,6 @@
 Name:         trousers
 Version:      0.3.14
-Release:      1
+Release:      2
 Summary:      The open-source TCG Software Stack
 License:      BSD
 Url:          http://trousers.sourceforge.net
@@ -9,7 +9,10 @@ Source0:      https://sourceforge.net/projects/trousers/files/trousers/0.3.14/tr
 Source1:      tcsd.service
 
 BuildRequires:    libtool openssl-devel systemd
-Requires:         shadow systemd
+Requires(pre):    shadow-utils
+Requires(post):   systemd-units
+Requires(preun):  systemd-units
+Requires(postun): systemd-units
 
 Provides:         trousers-lib
 Obsoletes:        trousers-lib
@@ -84,6 +87,9 @@ install -m 0644 %{SOURCE1} %{buildroot}%{_unitdir}/
 
 
 %changelog
+* Sat Dec 21 2019 openEuler Buildteam <buildteam@openeuler.org> - 1.9.8-2
+- Modify requires
+
 * Mon Oct 14 2019 openEuler Buildteam <buildteam@openeuler.org> - 1.9.8-1
 - update to 0.3.13