diff --git a/scons.spec b/scons.spec
index 52c9417..916ad0d 100644
--- a/scons.spec
+++ b/scons.spec
@@ -1,5 +1,5 @@
 Name:          scons
-Version:       2.3.6
+Version:       2.4.0
 Release:       1mamba
 Summary:       An Open Source software construction tool
 Group:         Development/Tools
@@ -57,6 +57,9 @@ rm -f .packlist
 %doc HOWTO LICENSE src/RELEASE.txt src/CHANGES.txt
 
 %changelog
+* Wed Sep 23 2015 Automatic Build System <autodist@mambasoft.it> 2.4.0-1mamba
+- automatic version update by autodist
+
 * Wed Aug 19 2015 Automatic Build System <autodist@mambasoft.it> 2.3.6-1mamba
 - automatic version update by autodist