diff --git a/openmamba-lsb.spec b/openmamba-lsb.spec
index 3c29031..d5136c4 100644
--- a/openmamba-lsb.spec
+++ b/openmamba-lsb.spec
@@ -31,13 +31,13 @@
 
 Name:          openmamba-lsb
 Version:       4.1
-Release:       5mamba
+Release:       6mamba
 Summary:       Linux Standard Base Core (%{lsb_archname})
 Group:         System/Configuration
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Davide Madrisan <davide.madrisan@gmail.com>
-URL:           http://www.linuxbase.org
+URL:           https://wiki.linuxfoundation.org/lsb/start
 # http://refspecs.linuxbase.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/lsbrelease.html
 Source0:       http://sourceforge.net/projects/lsb/files/lsb_release/%{lsbrelver}/lsb-release-%{lsbrelver}.tar.gz
 Source1:       lsb_init-functions.sh
@@ -83,7 +83,9 @@ BuildRequires: perl-devel
 BuildRequires: perl-Pod-Plainer
 ## AUTOBUILDREQ-END
 BuildRequires: openmamba-release >= 1.91-2
-Requires(pre): /usr/bin/install, /bin/ln
+BuildRequires: perl >= 2:5.36.0
+Requires(pre): /usr/bin/install
+Requires(pre): /usr/bin/ln
 Requires:      %{name}-core = %{?epoch:epoch:}%{version}-%{release}
 Requires:      %{name}-cxx = %{?epoch:epoch:}%{version}-%{release}
 #Requires:      %{name}-desktop = %{?epoch:epoch:}%{version}-%{release}
@@ -96,8 +98,7 @@ Provides:      lsb-%{lsb_archname} = %{version}
 Provides:      lsb-noarch = %{version}
 #
 Obsoletes:     lsb < 4.1
-ExclusiveArch: %{ix86} x86_64 ia64 arm aarch64
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+ExclusiveArch: %{ix86} x86_64 arm aarch64
 
 %description
 The goal of the Linux Standards Base (LSB) is to develop and promote a set of binary standards that will increase compatibility among Linux systems (and other similar systems), and enable software applications to run on any conforming system.
@@ -115,7 +116,7 @@ Provides:      lsb-core = %{version}
 Obsoletes:     lsb-core < 4.1
 # old module now part of the core specifications
 Provides:      lsb-security = %{?epoch:epoch:}%{version}-%{release}
-Obsoletes:     lsb-security
+Obsoletes:     lsb-security < 4.1
 # for backward compatibility
 Provides:      /usr/bin/lsb_release
 Provides:      /usr/lib/lsb/install_initd
@@ -129,64 +130,64 @@ Requires:      /usr/bin/[
 # alias   (Built in)
 Requires:      /usr/bin/ar
 Requires:      /usr/bin/at
-Requires:      /bin/awk
-Requires:      /bin/basename
+Requires:      /usr/bin/awk
+Requires:      /usr/bin/basename
 Requires:      /usr/bin/batch
 Requires:      /usr/bin/bc
 # bg      (Built in)
-Requires:      /bin/cat
+Requires:      /usr/bin/cat
 # cd      (Built in)
 Requires:      /usr/bin/chfn
-Requires:      /bin/chgrp
-Requires:      /bin/chmod
-Requires:      /bin/chown
+Requires:      /usr/bin/chgrp
+Requires:      /usr/bin/chmod
+Requires:      /usr/bin/chown
 Requires:      /usr/bin/chsh
 Requires:      /usr/bin/cksum
 Requires:      /usr/bin/cmp
 Requires:      /usr/bin/col
 Requires:      /usr/bin/comm
 # command (Built in)
-Requires:      /bin/cp
-Requires:      /bin/cpio
+Requires:      /usr/bin/cp
+Requires:      /usr/bin/cpio
 Requires:      /usr/bin/crontab
 Requires:      /usr/bin/csplit
-Requires:      /bin/cut
-Requires:      /bin/date
-Requires:      /bin/dd
-Requires:      /bin/df
+Requires:      /usr/bin/cut
+Requires:      /usr/bin/date
+Requires:      /usr/bin/dd
+Requires:      /usr/bin/df
 Requires:      /usr/bin/diff
 Requires:      /usr/bin/dirname
-Requires:      /bin/dmesg
+Requires:      /usr/bin/dmesg
 Requires:      /usr/bin/du
-Requires:      /bin/echo
-Requires:      /bin/ed
-Requires:      /bin/egrep
-Requires:      /bin/env
+Requires:      /usr/bin/echo
+Requires:      /usr/bin/ed
+Requires:      /usr/bin/egrep
+Requires:      /usr/bin/env
 Requires:      /usr/bin/expand
 Requires:      /usr/bin/expr
-Requires:      /bin/false
+Requires:      /usr/bin/false
 # fc      (Built in)
 # fg      (Built in)
-Requires:      /bin/fgrep
+Requires:      /usr/bin/fgrep
 Requires:      /usr/bin/file
 Requires:      /usr/bin/find
 Requires:      /usr/bin/fold
-Requires:      /bin/fuser
+Requires:      /usr/bin/fuser
 Requires:      /usr/bin/gencat
 Requires:      /usr/bin/getconf
 # getopts (Built in)
 Requires:      /usr/bin/gettext
-Requires:      /bin/grep
+Requires:      /usr/bin/grep
 Requires:      /usr/sbin/groupadd
 Requires:      /usr/sbin/groupdel
 Requires:      /usr/sbin/groupmod
 # NOTE: Debian, RHEL, OpenSuSE: /usr/bin/groups
-Requires:      /bin/groups
-Requires:      /bin/gunzip
-Requires:      /bin/gzip
+Requires:      /usr/bin/groups
+Requires:      /usr/bin/gunzip
+Requires:      /usr/bin/gzip
 # hash    (Built in)
 Requires:      /usr/bin/head
-Requires:      /bin/hostname
+Requires:      /usr/bin/hostname
 Requires:      /usr/bin/iconv
 Requires:      /usr/bin/id
 Requires:      /usr/bin/install
@@ -196,32 +197,32 @@ Requires:      /usr/bin/ipcrm
 Requires:      /usr/bin/ipcs
 # jobs    (Built in)
 Requires:      /usr/bin/join
-Requires:      /bin/kill
+Requires:      /usr/bin/kill
 Requires:      /usr/bin/killall
-Requires:      /bin/ln
+Requires:      /usr/bin/ln
 Requires:      /usr/bin/locale
 Requires:      /usr/bin/localedef
 Requires:      /usr/bin/logger
 Requires:      /usr/bin/logname
 Requires:      /usr/bin/lp
 Requires:      /usr/bin/lpr
-Requires:      /bin/ls
+Requires:      /usr/bin/ls
 Requires:      /usr/bin/lsb_release
 Requires:      /usr/bin/m4
-Requires:      /bin/mailx
+Requires:      /usr/bin/mailx
 Requires:      /usr/bin/make
 Requires:      /usr/bin/man
 Requires:      /usr/bin/md5sum
-Requires:      /bin/mkdir
+Requires:      /usr/bin/mkdir
 Requires:      /usr/bin/mkfifo
-Requires:      /bin/mknod
-Requires:      /bin/mktemp
-Requires:      /bin/more
-Requires:      /bin/mount
+Requires:      /usr/bin/mknod
+Requires:      /usr/bin/mktemp
+Requires:      /usr/bin/more
+Requires:      /usr/bin/mount
 Requires:      /usr/bin/msgfmt
-Requires:      /bin/mv
+Requires:      /usr/bin/mv
 Requires:      /usr/bin/newgrp
-Requires:      /bin/nice
+Requires:      /usr/bin/nice
 Requires:      /usr/bin/nl
 Requires:      /usr/bin/nohup
 Requires:      /usr/bin/od
@@ -231,46 +232,46 @@ Requires:      /usr/bin/patch
 Requires:      /usr/bin/pathchk
 Requires:      /usr/bin/pax
 # NOTE (LSB): pidof may be stored in /sbin
-Requires:      /bin/pidof
+Requires:      /usr/bin/pidof
 Requires:      /usr/bin/pr
 Requires:      /usr/bin/printf
-Requires:      /bin/ps
-Requires:      /bin/pwd
+Requires:      /usr/bin/ps
+Requires:      /usr/bin/pwd
 # read    (Built in)
 # note: remove_initd is provided by this package
 #Requires:      /usr/lib/lsb/remove_initd
 Requires:      /usr/bin/renice
-Requires:      /bin/rm
-Requires:      /bin/rmdir
-Requires:      /bin/sed
+Requires:      /usr/bin/rm
+Requires:      /usr/bin/rmdir
+Requires:      /usr/bin/sed
 Requires:      /usr/sbin/sendmail
 Requires:      /usr/bin/seq
-Requires:      /bin/sh
-Requires:      /sbin/shutdown
-Requires:      /bin/sleep
-Requires:      /bin/sort
+Requires:      /usr/bin/sh
+Requires:      /usr/sbin/shutdown
+Requires:      /usr/bin/sleep
+Requires:      /usr/bin/sort
 Requires:      /usr/bin/split
 Requires:      /usr/bin/strings
 Requires:      /usr/bin/strip
-Requires:      /bin/stty
-Requires:      /bin/su
-Requires:      /bin/sync
+Requires:      /usr/bin/stty
+Requires:      /usr/bin/su
+Requires:      /usr/bin/sync
 Requires:      /usr/bin/tail
-Requires:      /bin/tar
+Requires:      /usr/bin/tar
 Requires:      /usr/bin/tee
 Requires:      /usr/bin/test
 Requires:      /usr/bin/time
-Requires:      /bin/touch
+Requires:      /usr/bin/touch
 Requires:      /usr/bin/tr
-Requires:      /bin/true
+Requires:      /usr/bin/true
 Requires:      /usr/bin/tsort
 Requires:      /usr/bin/tty
 # type    (Built in)
 # ulimit  (Built in)
 # umask   (Built in)
-Requires:      /bin/umount
+Requires:      /usr/bin/umount
 # unalias (Built in)
-Requires:      /bin/uname
+Requires:      /usr/bin/uname
 Requires:      /usr/bin/unexpand
 Requires:      /usr/bin/uniq
 Requires:      /usr/sbin/useradd
@@ -279,7 +280,7 @@ Requires:      /usr/sbin/usermod
 # wait    (Built in)
 Requires:      /usr/bin/wc
 Requires:      /usr/bin/xargs
-Requires:      /bin/zcat
+Requires:      /usr/bin/zcat
 # Module LSB-Core
 #  \ SubModule LSB_Core (Core LSB Specification)
 #     \ Libraries
@@ -356,9 +357,9 @@ Provides:      lsb-desktop-%{lsb_archname} = %{version}
 Provides:      lsb-graphics-%{lsb_archname} = %{version}
 #
 Provides:      lsb-graphics = %{version}
-Obsoletes:     lsb-graphics
+Obsoletes:     lsb-graphics < 4.1
 Provides:      lsb-multimedia = %{version}
-Obsoletes:     lsb-multimedia
+Obsoletes:     lsb-multimedia < 4.1
 #
 Requires:      %{name}-core = %{?epoch:epoch:}%{version}-%{release}
 Requires:      %{name}-languages = %{?epoch:epoch:}%{version}-%{release}
@@ -462,7 +463,7 @@ Requires:      perl(Attribute::Handlers)
 Requires:      perl(AutoLoader)
 Requires:      perl(AutoSplit)
 Requires:      perl(B::Concise)
-Requires:      perl(B::Debug)
+#Requires:      perl(B::Debug)
 Requires:      perl(B::Deparse)
 Requires:      perl(B::Lint)
 Requires:      perl(B::Showlex)
@@ -602,7 +603,7 @@ Requires:      perl(MIME::QuotedPrint)
 Requires:      perl(Math::BigFloat)
 Requires:      perl(Math::BigInt)
 Requires:      perl(Math::BigInt::Calc)
-Requires:      perl(Math::BigInt::CalcEmu)
+#Requires:      perl(Math::BigInt::CalcEmu)
 Requires:      perl(Math::BigRat)
 Requires:      perl(Math::Complex)
 Requires:      perl(Math::Trig)
@@ -883,6 +884,9 @@ EOF
 %{_sysconfdir}/lsb-release.d/printing-*
 
 %changelog
+* Mon Apr 17 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1-6mamba
+- fixed deps with perl 5.36.0
+
 * Thu Aug 01 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1-5mamba
 - move /lib/lsb to /usr/lib/lsb for usr merge