diff --git a/z3.spec b/z3.spec
index 9f13e72..f691974 100644
--- a/z3.spec
+++ b/z3.spec
@@ -1,5 +1,5 @@
 Name:          z3
-Version:       4.8.5
+Version:       4.8.6
 Release:       1mamba
 Summary:       A theorem prover from Microsoft Research
 Group:         System/Libraries
@@ -80,6 +80,9 @@ python contrib/cmake/bootstrap.py create
 %doc README-CMake.md README.md
 
 %changelog
+* Mon Sep 30 2019 Automatic Build System <autodist@mambasoft.it> 4.8.6-1mamba
+- automatic version update by autodist
+
 * Thu Jun 06 2019 Automatic Build System <autodist@mambasoft.it> 4.8.5-1mamba
 - automatic version update by autodist