diff --git a/pngcrush.spec b/pngcrush.spec
index 35f5b00..c76d8ec 100644
--- a/pngcrush.spec
+++ b/pngcrush.spec
@@ -1,5 +1,5 @@
 Name:          pngcrush
-Version:       1.8.12
+Version:       1.8.13
 Release:       1mamba
 Summary:       An optimizer for PNG (Portable Network Graphics) files
 Group:         Applications/Graphics
@@ -43,6 +43,9 @@ install -D -m0755 pngcrush %{buildroot}%{_bindir}/pngcrush
 %{_bindir}/pngcrush
 
 %changelog
+* Mon Sep 11 2017 Automatic Build System <autodist@mambasoft.it> 1.8.13-1mamba
+- automatic version update by autodist
+
 * Mon Sep 04 2017 Automatic Build System <autodist@mambasoft.it> 1.8.12-1mamba
 - automatic version update by autodist