diff --git a/libmdds.spec b/libmdds.spec
index 8b7a4dc..362f195 100644
--- a/libmdds.spec
+++ b/libmdds.spec
@@ -1,8 +1,9 @@
 %define with_mem_tests  0
 %define with_perf_tests 0
-%define apiver %(echo %version|cut -d. -f1-2)
+#%define apiver %(echo %version|cut -d. -f1-2)
+%define apiver 1.2
 Name:          libmdds
-Version:       1.2.3
+Version:       1.3.1
 Release:       1mamba
 Summary:       A collection of multi-dimensional data structure and indexing algorithm (mdds)
 Group:         System/Libraries
@@ -88,6 +89,9 @@ rm -rf %{buildroot}%{_docdir}
 %doc AUTHORS VERSION
 
 %changelog
+* Sat Jan 06 2018 Automatic Build System <autodist@mambasoft.it> 1.3.1-1mamba
+- automatic version update by autodist
+
 * Mon Aug 07 2017 Automatic Build System <autodist@mambasoft.it> 1.2.3-1mamba
 - automatic version update by autodist