diff --git a/belle-sip.spec b/belle-sip.spec
index 4ee42f4..a679786 100644
--- a/belle-sip.spec
+++ b/belle-sip.spec
@@ -1,5 +1,5 @@
 Name:          belle-sip
-Version:       1.5.0
+Version:       1.6.3
 Release:       1mamba
 Summary:       A SIP (RFC3261) implementation written in C, with an object oriented API.
 Group:         System/Libraries
@@ -7,7 +7,8 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://www.linphone.org
-Source:        http://download.savannah.gnu.org/releases/linphone/belle-sip/%{name}-%{version}.tar.gz
+#Source:        http://download.savannah.gnu.org/releases/linphone/belle-sip/%{name}-%{version}.tar.gz
+Source:        https://github.com/BelledonneCommunications/belle-sip.git/%{version}/%{name}-%{version}.tar.bz2
 Patch0:        belle-sip-1.5.0-fix-internal-includes.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
@@ -15,9 +16,10 @@ BuildRequires: glibc-devel
 BuildRequires: libantlr3c-devel
 BuildRequires: libbctoolbox-devel
 BuildRequires: libgcc
+BuildRequires: libpolarssl-devel
+BuildRequires: libstdc++6-devel
 BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
-BuildRequires: libpolarssl-devel >= 1.3.8-1mamba
 BuildRequires: antlr3
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
@@ -45,12 +47,13 @@ This package contains libraries and header files for developing applications tha
 
 %prep
 %setup -q
-%patch0 -p1
+#%patch0 -p1
 sed -i \
   -e "s#antlr_java_prefixes=.*#antlr_java_prefixes="$srcdir"#" \
   configure.ac
 
 %build
+./autogen.sh
 %configure \
    CFLAGS="-Wno-error"
 
@@ -79,9 +82,12 @@ sed -i \
 %{_libdir}/libbellesip.a
 %{_libdir}/libbellesip.la
 %{_libdir}/pkgconfig/belle-sip.pc
-%doc NEWS README
+%doc NEWS
 
 %changelog
+* Tue Sep 05 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 1.6.3-1mamba
+- update to 1.6.3
+
 * Sun Dec 18 2016 Automatic Build System <autodist@mambasoft.it> 1.5.0-1mamba
 - automatic version update by autodist