diff --git a/meep.spec b/meep.spec
index 34e54eb..0cbe77c 100644
--- a/meep.spec
+++ b/meep.spec
@@ -1,5 +1,5 @@
 Name:          meep
-Version:       1.2.1
+Version:       1.3
 Release:       1mamba
 Summary:       A free finite-difference time-domain (FDTD) simulation software package
 Group:         Applications/Scientific
@@ -32,9 +32,10 @@ BuildRequires: libstdc++6-devel
 BuildRequires: libunistring-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
-%ifarch x86_86
+%ifarch x86_64
 BuildRequires: libatlas-devel
 %endif
+BuildRequires: libunistring-devel >= 0.9.6
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -104,6 +105,9 @@ This package contains libraries and header files for developing applications tha
 %doc NEWS TODO
 
 %changelog
+* Sun May 15 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 1.3-1mamba
+- update to 1.3
+
 * Thu Nov 06 2014 Automatic Build System <autodist@mambasoft.it> 1.2.1-1mamba
 - automatic update by autodist