diff --git a/protobuf.spec b/protobuf.spec
index 2efa9cb..b6b3439 100644
--- a/protobuf.spec
+++ b/protobuf.spec
@@ -1,5 +1,5 @@
 Name:          protobuf
-Version:       3.12.0
+Version:       3.12.3
 Release:       1mamba
 Summary:       A way of encoding structured data in an efficient yet extensible format
 Group:         Development/Tools
@@ -87,6 +87,9 @@ LDFLAGS="-latomic"
 %{_libdir}/pkgconfig/protobuf*.pc
 
 %changelog
+* Wed Jul 01 2020 Automatic Build System <autodist@mambasoft.it> 3.12.3-1mamba
+- automatic version update by autodist
+
 * Wed Jun 03 2020 Automatic Build System <autodist@mambasoft.it> 3.12.0-1mamba
 - automatic version update by autodist