diff --git a/protobuf.spec b/protobuf.spec
index a00c3e8..68b6319 100644
--- a/protobuf.spec
+++ b/protobuf.spec
@@ -1,5 +1,5 @@
 Name:          protobuf
-Version:       21.6
+Version:       21.7
 Release:       1mamba
 Summary:       A way of encoding structured data in an efficient yet extensible format
 Group:         Development/Tools
@@ -111,6 +111,9 @@ sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
 %{python3_sitearch}/protobuf-*-py*.egg-info/*
 
 %changelog
+* Fri Sep 30 2022 Automatic Build System <autodist@mambasoft.it> 21.7-1mamba
+- automatic version update by autodist
+
 * Sat Sep 17 2022 Automatic Build System <autodist@mambasoft.it> 21.6-1mamba
 - automatic version update by autodist