diff --git a/bison.spec b/bison.spec
index 0cfb872..d4d248a 100644
--- a/bison.spec
+++ b/bison.spec
@@ -1,5 +1,5 @@
 Name:          bison
-Version:       3.4.1
+Version:       3.4.2
 Release:       1mamba
 Summary:       A GNU general-purpose parser generator
 Group:         Applications/Development
@@ -81,6 +81,9 @@ cat %{name}-runtime.lang %{name}-gnulib.lang >> %{name}.lang
 # ChangeLog NEWS README THANKS TODO
 
 %changelog
+* Fri Sep 13 2019 Automatic Build System <autodist@mambasoft.it> 3.4.2-1mamba
+- automatic version update by autodist
+
 * Sat Jul 06 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 3.4.1-1mamba
 - update to 3.4.1