diff --git a/runc.spec b/runc.spec
index 5307341..6b5e98e 100644
--- a/runc.spec
+++ b/runc.spec
@@ -1,5 +1,6 @@
+%define gitver %(echo %version | tr _ -)
 Name:          runc
-Version:       0.1.1
+Version:       1.0.0_rc5
 Release:       1mamba
 Summary:       runc container cli tools
 Group:         System/Servers
@@ -8,14 +9,14 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.opencontainers.org/
 ## GITSOURCE https://github.com/opencontainers/runc.git v0.1.1
-Source:        https://github.com/opencontainers/runc.git/v%{version}/runc-%{version}.tar.bz2
+Source:        https://github.com/opencontainers/runc.git/v%{gitver}/runc-%{version}.tar.bz2
 License:       Apache License 2.0
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: libgcc
-BuildRequires: libgo-devel
 BuildRequires: libseccomp-devel
 ## AUTOBUILDREQ-END
+BuildRequires: go-pie
+BuildRequires: libgo-devel >= 7.3.0-1mamba
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -51,5 +52,8 @@ mv man/man*/ %{buildroot}%{_mandir}
 %doc LICENSE
 
 %changelog
+* Thu Apr 19 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 1.0.0_rc5-1mamba
+- update to 1.0.0_rc5
+
 * Fri Jul 29 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 0.1.1-1mamba
 - package created using the webbuild interface