diff --git a/mosh.spec b/mosh.spec
index a58cbed..2a71b1d 100644
--- a/mosh.spec
+++ b/mosh.spec
@@ -1,18 +1,17 @@
 Name:          mosh
-Version:       1.3.2
-Release:       3mamba
+Version:       1.4.0
+Release:       1mamba
 Summary:       A remote terminal application that allows roaming, supports intermittent connectivity, and more
 Group:         Network/Security
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://mosh.mit.edu/
-Source:        git://github.com/keithw/mosh.git/master/mosh-%{version}.tar.bz2
+URL:           https://mosh.org/
+Source:        https://github.com/mobile-shell/mosh.git/mosh-%{version}/mosh-%{version}.tar.bz2
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-BuildRequires: ldconfig
-BuildRequires: libatomic-devel
+BuildRequires: libabseil-cpp-devel
 BuildRequires: libgcc
 BuildRequires: libncurses-devel
 BuildRequires: libopenssl-devel
@@ -23,8 +22,8 @@ BuildRequires: libutempter-devel
 BuildRequires: libz-devel
 BuildRequires: perl-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libprotobuf-devel >= 28.1
 Requires:      perl-IO-Tty
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Mosh (mobile shell) is a remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line editing of user keystrokes.
@@ -37,12 +36,10 @@ Mosh is a replacement for SSH. It's more robust and responsive, especially over
 ./autogen.sh
 
 %build
-%configure
+%configure \
+   CXXFLAGS="%{optflags} -std=c++17"
 
-%make \
-%ifarch arm
-LDFLAGS="-latomic"
-%endif
+%make
 
 %install
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
@@ -62,6 +59,9 @@ LDFLAGS="-latomic"
 %doc AUTHORS COPYING THANKS
 
 %changelog
+* Tue Apr 09 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 1.4.0-1mamba
+- update to 1.4.0
+
 * Fri Sep 25 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.3.2-3mamba
 - rebuilt