diff --git a/packaging/rpm/lsc-executable-plugin.spec b/packaging/rpm/lsc-executable-plugin.spec
index e460e38..98e35a2 100644
--- a/packaging/rpm/lsc-executable-plugin.spec
+++ b/packaging/rpm/lsc-executable-plugin.spec
@@ -7,85 +7,94 @@
 #
 # Copyright (c) 2009 - 2021 LSC Project
 #=================================================
+%global lsc_min_version		2.3
 
-#=================================================
-# Variables
-#=================================================
-%define lsc_executable_name	lsc-executable-plugin
-%define lsc_executable_version	1.3
-%define lsc_min_version		2.2
-%define lsc_user		lsc
-%define lsc_group		lsc
+%bcond build_from_sources 0
+%bcond tests              0
 
-#=================================================
-# Header
-#=================================================
-Summary: LSC Executable plugin
-Name: %{lsc_executable_name}
-Version: %{lsc_executable_version}
+Name: lsc-executable-plugin
+Version: 1.4
 Release: 1%{?dist}
-License: BSD
-BuildArch: noarch
-
-Group: Applications/System
+Summary: LSC Executable plugin
+License: BSD-3-Clause
 URL: https://lsc-project.org
+%if %{with build_from_sources}
+Source0: https://github.com/lsc-project/%{name}/archive/v%{version}/%{name}-%{version}.tar.gz
+%else
+Source1: https://www.lsc-project.org/archives/lsc-executable-plugin-%{version}.jar
+Source2: https://raw.githubusercontent.com/lsc-project/%{name}/refs/tags/v%{version}/scripts/lsc-executable-add-modify-delete-modrdn.pl
+Source3: https://raw.githubusercontent.com/lsc-project/%{name}/refs/tags/v%{version}/scripts/lsc-executable-csv2ldif-get.pl
+Source4: https://raw.githubusercontent.com/lsc-project/%{name}/refs/tags/v%{version}/scripts/lsc-executable-csv2ldif-list.pl
+%endif
+BuildArch: noarch
 
-Source: %{lsc_executable_name}-%{lsc_executable_version}.jar
-Source1: lsc-executable-add-modify-delete-modrdn.pl
-Source2: lsc-executable-csv2ldif-get.pl
-Source3: lsc-executable-csv2ldif-list.pl
-BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
-
-Requires(pre): coreutils
+BuildRequires: coreutils
+%if %{with build_from_sources}
+BuildRequires: jpackage-utils
+BuildRequires: java-devel >= 1:21
+BuildRequires: maven
+BuildRequires: maven-local
+%endif
 Requires: lsc >= %{lsc_min_version}
 
-%description
-This is an Executable plugin for LSC
 
-%prep
+%description
+This is an Executable plugin for LSC.
 
-%build
 
-%install
+%prep
+%if %{with build_from_sources}
+%setup -q
+%endif
 
-rm -rf %{buildroot}
 
-# Create directories
-mkdir -p %{buildroot}/usr/%{_lib}/lsc
-mkdir -p %{buildroot}/var/lib/lsc
+%build
+%if %{with build_from_sources}
+mvn %{!?with_tests:"-Dmaven.test.skip=true"} package
+%endif
 
-# Copy files
-cp -a %{SOURCE0} %{buildroot}/usr/%{_lib}/lsc
-cp -a %{SOURCE1} %{buildroot}/var/lib/lsc
-cp -a %{SOURCE2} %{buildroot}/var/lib/lsc
-cp -a %{SOURCE3} %{buildroot}/var/lib/lsc
 
-%post
+%install
+# Jar
+mkdir -p %{buildroot}%{_libdir}/lsc
+%if %{with build_from_sources}
+install -m 0644 target/%{name}-%{version}.jar \
+  %{buildroot}%{_libdir}/lsc
+%else
+install -m 0644 %{SOURCE1} %{buildroot}%{_libdir}/lsc/
+mkdir scripts
+install -m 0644 %{SOURCE2} %{SOURCE3} %{SOURCE4} scripts/
+%endif
 
-/bin/chown -R %{lsc_user}:%{lsc_group} /usr/%{_lib}/lsc 
-/bin/chown -R %{lsc_user}:%{lsc_group} /var/lib/lsc 
 
+%files
+%if %{with build_from_sources}
+%license LICENSE.txt
+%doc README.md doc/*
+%endif
+%doc scripts/*
+%{_libdir}/lsc/lsc-executable-plugin*
 
-%postun
 
-%clean
-rm -rf %{buildroot}
+%changelog
+* Mon Jul 27 2026 Xavier Bachelot <xavier.bachelot@worteks.com> - 1.4-1
+- Update to 1.4
+  - Properly handle Base64-encoded attributes
+  - Compatibility with LSC 2.3
+- Clean rpm specfile
 
-%files
-%defattr(-, root, root, 0755)
-/usr/%{_lib}/lsc/lsc-executable-plugin*
-/var/lib/lsc/lsc-executable*
+* Mon Jul 21 2025 Xavier Bachelot <xavier.bachelot@worteks.com> - 1.3-2
+- Rework specfile
 
-#=================================================
-# Changelog
-#=================================================
-%changelog
 * Mon Jul 21 2025 - Clement Oudot <clem@lsc-project.org> - 1.3-1
 - Upgrade to 1.3
 - fix value comparison + add unit test for executableLdifDestinationService task
+
 * Mon Apr 14 2025 - Clement Oudot <clem@lsc-project.org> - 1.2-1
 - Upgrade to 1.2
+
 * Thu Jan 07 2021 - Clement Oudot <clem@lsc-project.org> - 1.1-0
 - Upgrade to 1.1
+
 * Tue Mar 04 2014 - Clement Oudot <clem@lsc-project.org> - 1.0-0
 - First package for LSC Executable plugin