diff --git a/rpm/SPECS/shadowsocks-libev.spec.in b/rpm/SPECS/shadowsocks-libev.spec.in
index 684831b5..029a1a86 100644
--- a/rpm/SPECS/shadowsocks-libev.spec.in
+++ b/rpm/SPECS/shadowsocks-libev.spec.in
@@ -8,19 +8,39 @@ License:	GPLv3+
 URL:		https://github.com/shadowsocks/%{name}
 Source0:	%{url}/archive/v%{version}.tar.gz
 
-BuildRequires: make gcc openssl-devel pcre-devel asciidoc xmlto
-Requires:	openssl
-
-%if 0%{?rhel} > 6
-Requires(post): systemd
-Requires(preun): systemd
-Requires(postun): systemd
-BuildRequires: systemd
+AutoReq:        no
+Conflicts:	    python-shadowsocks python3-shadowsocks
+BuildRequires:	make gcc pcre-devel asciidoc xmlto
+Requires:       pcre
+
+%if 0%{?suse_version}
+Requires:       libopenssl1_0_0
+BuildRequires:  libopenssl-devel
+%else
+Requires:       openssl-libs
+BuildRequires:  openssl-devel
+%endif
+
+%if 0%{?fedora} >= 15 || 0%{?rhel} >=7 || 0%{?suse_version} >= 1210
+%global use_systemd 1
+%else
+%global use_systemd 0
+%endif
+
+%if 0%{?use_systemd}
+%{?systemd_requires}
+%if 0%{?suse_version}
+BuildRequires:   systemd-rpm-macros
+%else
+BuildRequires:   systemd
+%endif
 %endif
 
-Conflicts:	python-shadowsocks python3-shadowsocks
+%if 0%{?use_system_lib}
+BuildRequires:  libev-devel libsodium-devel >= 1.0.4 udns-devel
+Requires:       libev libsodium >= 1.0.4 udns
+%endif
 
-AutoReq:	no
 
 %description
 shadowsocks-libev is a lightweight secured scoks5 proxy for embedded devices and low end boxes.
@@ -31,14 +51,18 @@ shadowsocks-libev is a lightweight secured scoks5 proxy for embedded devices and
 
 
 %build
+%if 0%{?use_system_lib}
+%configure --enable-shared --enable-system-shared-lib
+%else
 %configure --enable-shared
+%endif
 make %{?_smp_mflags}
 
 
 %install
 make install DESTDIR=%{buildroot}
 mkdir -p %{buildroot}/etc/shadowsocks-libev
-%if 0%{?rhel} == 6
+%if ! 0%{?use_systemd}
 mkdir -p %{buildroot}%{_initddir}
 install -m 755 %{_builddir}/%{buildsubdir}/rpm/SOURCES/etc/init.d/shadowsocks-libev %{buildroot}%{_initddir}/shadowsocks-libev
 %else
@@ -52,25 +76,37 @@ install -m 644 %{_builddir}/%{buildsubdir}/debian/config.json %{buildroot}%{_sys
 mkdir -p %{buildroot}%{_datadir}/bash-completion/completions/
 install -m 644 %{_builddir}/%{buildsubdir}/completions/bash/* %{buildroot}%{_datadir}/bash-completion/completions/
 
+%pre
+%if 0%{?use_systemd} && 0%{?suse_version}
+%service_add_pre shadowsocks-libev.service
+%endif
+
 %post
-%if 0%{?rhel} <= 6
-/sbin/chkconfig --add shadowsocks-libev
+%if ! 0%{?use_systemd}
+/sbin/chkconfig --add shadowsocks-libev > /dev/null 2>&1 || :
+%elif 0%{?suse_version}
+%service_add_post shadowsocks-libev.service
 %else
 %systemd_post shadowsocks-libev.service
 %endif
 
 %preun
-%if 0%{?rhel} <= 6
+%if ! 0%{?use_systemd}
 if [ $1 -eq 0 ]; then
-    /sbin/service shadowsocks-libev stop
-    /sbin/chkconfig --del shadowsocks-libev
+    /sbin/service shadowsocks-libev stop  > /dev/null 2>&1 || :
+    /sbin/chkconfig --del shadowsocks-libev > /dev/null 2>&1 || :
 fi
+%elif 0%{?suse_version}
+%service_del_preun shadowsocks-libev.service
 %else
 %systemd_preun shadowsocks-libev.service
 %endif
 
-%if 0%{?rhel} > 6
 %postun
+%if ! 0%{?use_systemd}
+%elif 0%{?suse_version}
+%service_del_postun shadowsocks-libev.service
+%else
 %systemd_postun_with_restart shadowsocks-libev.service
 %endif
 
@@ -85,11 +121,10 @@ fi
 /usr/share/doc/shadowsocks-libev/ss-tunnel.html
 %{_bindir}/*
 %{_libdir}/*.so.*
-%{_libdir}/pkgconfig/*.pc
 %config(noreplace) %{_sysconfdir}/shadowsocks-libev/config.json
 %{_datadir}/bash-completion/completions/*
 %doc %{_mandir}/*
-%if 0%{?rhel} <= 6
+%if ! 0%{?use_systemd}
 %{_initddir}/shadowsocks-libev
 %else
 %{_unitdir}/shadowsocks-libev.service
@@ -108,6 +143,7 @@ Development files for shadowsocks-libev
 
 %files devel
 %{_includedir}/*
+%{_libdir}/pkgconfig/*.pc
 %{_libdir}/libshadowsocks-libev.la
 %{_libdir}/libshadowsocks-libev.so