diff --git a/zchunk.spec b/zchunk.spec
index a401779..041426f 100644
--- a/zchunk.spec
+++ b/zchunk.spec
@@ -1,5 +1,5 @@
 Name:          zchunk
-Version:       1.3.2
+Version:       1.4.0
 Release:       1mamba
 Summary:       A file format designed for highly efficient deltas while maintaining good compression
 Group:         Applications/Archiving
@@ -86,6 +86,9 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Wed Dec 20 2023 Automatic Build System <autodist@mambasoft.it> 1.4.0-1mamba
+- automatic version update by autodist
+
 * Sat Oct 07 2023 Automatic Build System <autodist@mambasoft.it> 1.3.2-1mamba
 - automatic version update by autodist