diff --git a/pngcrush.spec b/pngcrush.spec
index 870719e..4b17b32 100644
--- a/pngcrush.spec
+++ b/pngcrush.spec
@@ -1,5 +1,5 @@
 Name:          pngcrush
-Version:       1.7.88
+Version:       1.7.91
 Release:       1mamba
 Summary:       An optimizer for PNG (Portable Network Graphics) files
 Group:         Applications/Graphics
@@ -39,6 +39,9 @@ install -D -m0755 pngcrush %{buildroot}%{_bindir}/pngcrush
 %{_bindir}/pngcrush
 
 %changelog
+* Sun Jan 03 2016 Automatic Build System <autodist@mambasoft.it> 1.7.91-1mamba
+- automatic version update by autodist
+
 * Wed Nov 18 2015 Automatic Build System <autodist@mambasoft.it> 1.7.88-1mamba
 - automatic version update by autodist