diff --git a/bash.spec b/bash.spec
index 3944ab0..71b852e 100644
--- a/bash.spec
+++ b/bash.spec
@@ -3,7 +3,7 @@
 
 Name:          bash
 Version:       5.1.004
-Release:       1mamba
+Release:       2mamba
 Summary:       The GNU Bourne Again shell (bash)
 Group:         Applications/Shells
 Vendor:        openmamba
@@ -38,7 +38,8 @@ Requires(pre): glibc
 Requires(post): %{__install_info}
 Requires(post): chkconfig
 Provides:      /bin/sh
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+Provides:      /usr/bin/bash
+Provides:      /usr/bin/sh
 
 %description
 Bash (Bourne Again shell) is the shell, or command language interpreter, that will appear in the GNU operating system.
@@ -188,6 +189,9 @@ exit 0
 %{_docdir}/bash/*
 
 %changelog
+* Fri Mar 05 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 5.1.004-2mamba
+- provide /usr/bin/sh to allow filesystem 2.3 upgrade
+
 * Wed Dec 23 2020 Automatic Build System <autodist@mambasoft.it> 5.1.004-1mamba
 - automatic version update by autodist