diff --git a/p7zip.spec b/p7zip.spec
index 41c1743..d281f81 100644
--- a/p7zip.spec
+++ b/p7zip.spec
@@ -1,29 +1,31 @@
 Name:          p7zip
-Version:       16.02
+Version:       17.05
 Release:       1mamba
-Summary:       A file archiver with highest compression ratio.
+Summary:       A file archiver with highest compression ratio
 Group:         Applications/Archiving
 Vendor:        openmamba
 Distribution:  openmamba
-Packager:      Stefano Cotta Ramusino <whitone@gmail.com>
-URL:           http://p7zip.sourceforge.net/
-Source:        http://downloads.sourceforge.net/sourceforge/%{name}/%{name}_%{version}_src_all.tar.bz2
+Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
+URL:           https://github.com/p7zip-project/p7zip
+Source:        https://github.com/p7zip-project/p7zip.git/v%{version}/p7zip-%{version}.tar.bz2
 License:       LGPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libgcc
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 p7zip is a port of 7z.exe and 7za.exe for Unix. 7z.exe and 7za.exe are the command line version of 7-zip, a file archiver with highest compression ratio.
 
+%debug_package
+
 %prep
-%setup -q -n %{name}_%{version}
+%setup -q
+sed -i "s|strip|/bin/true|" install.sh
 
 %build
-%make all3
+%make all3 OPTFLAGS="%{optflags}"
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -32,15 +34,13 @@ make install \
    DEST_MAN=%{buildroot}%{_mandir} \
    DEST_SHARE_DOC=%{buildroot}%{_docdir}/%{name}-%{version}
 
+# Strip buildroot from symlinks in bindir
+sed -i 's/'`echo %{buildroot} | sed 's/\//\\\\\//g'`'//' \
+   %{buildroot}%{_bindir}/7z{,a,r}
+
 chmod -R a+w %{buildroot}%{_defaultdocdir}/%{name}-%{version}
 rm -fr %{buildroot}%{_defaultdocdir}/%{name}-%{version}
 
-sed -i 's/'`echo %{buildroot} | sed 's/\//\\\\\//g'`'//' \
-   %{buildroot}%{_bindir}/7z{,a}
-
-# fix permissions for the documentations
-#chmod -R a+r DOCS
-
 # fix permissions for tools
 chmod 755 %{buildroot}%{_prefix}/lib/%{name}/7z{,a,Con.sfx}
 
@@ -73,6 +73,9 @@ install -D -m 755 contrib/gzip-like_CLI_wrapper_for_7z/%{name} \
 #%doc contrib/gzip-like_CLI_wrapper_for_7z/README
 
 %changelog
+* Fri Mar 15 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 17.05-1mamba
+- update to 17.05
+
 * Sat Jul 16 2016 Automatic Build System <autodist@mambasoft.it> 16.02-1mamba
 - automatic version update by autodist