diff --git a/acpica.spec b/acpica.spec
index 1b729c9..8f9f94e 100644
--- a/acpica.spec
+++ b/acpica.spec
@@ -1,12 +1,12 @@
 Name:          acpica
-Version:       20210105
+Version:       20210331
 Release:       1mamba
 Summary:       Advanced Configuration & Power Interface Component Architecture
 Group:         System/Kernel and Hardware
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Stefano Cotta Ramusino <stefano.cotta@openmamba.org>
-URL:           http://www.intel.com/technology/iapc/acpi/downloads.htm
+URL:           https://www.intel.com/technology/iapc/acpi/downloads.htm
 Source:        https://acpica.org/sites/acpica/files/acpica-unix-%{version}.tar.gz
 Source1:       %{name}-license
 Source2:       http://www.intel.com/technology/iapc/acpi/downloads/AslCompiler.pdf
@@ -20,7 +20,6 @@ BuildRequires: glibc-devel
 BuildRequires: flex
 BuildRequires: bison
 ExclusiveArch: %{ix86} x86_64
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Advanced Configuration & Power Interface Component Architecture (ACPI CA) provides a reference implementation of software components that enable OS support for interfaces defined in the ACPI 1.0b specification.
@@ -52,6 +51,9 @@ cp %{S:2} %{S:3} .
 %doc source/LICENSE
 
 %changelog
+* Tue Apr 06 2021 Automatic Build System <autodist@mambasoft.it> 20210331-1mamba
+- automatic version update by autodist
+
 * Tue Jan 12 2021 Automatic Build System <autodist@mambasoft.it> 20210105-1mamba
 - automatic version update by autodist