diff --git a/acpica.spec b/acpica.spec
index 1077b42..6ebbdb2 100644
--- a/acpica.spec
+++ b/acpica.spec
@@ -1,5 +1,5 @@
 Name:          acpica
-Version:       20201113
+Version:       20201217
 Release:       1mamba
 Summary:       Advanced Configuration & Power Interface Component Architecture
 Group:         System/Kernel and Hardware
@@ -52,6 +52,9 @@ cp %{S:2} %{S:3} .
 %doc source/LICENSE
 
 %changelog
+* Mon Dec 21 2020 Automatic Build System <autodist@mambasoft.it> 20201217-1mamba
+- automatic version update by autodist
+
 * Sun Nov 15 2020 Automatic Build System <autodist@mambasoft.it> 20201113-1mamba
 - automatic version update by autodist