diff --git a/kotlin.spec b/kotlin.spec
index 09ec50e..dd4b861 100644
--- a/kotlin.spec
+++ b/kotlin.spec
@@ -1,6 +1,6 @@
 %define pkgver %(echo %version | tr _ -)
 Name:          kotlin
-Version:       1.9.20
+Version:       1.9.21
 Release:       1mamba
 Summary:       Statically typed programming language that can interoperate with Java
 Group:         Applications/Development
@@ -60,6 +60,9 @@ install -D -m0644 build.txt %{buildroot}%{_datadir}/kotlin/build.txt
 %doc license/LICENSE.txt license/COPYRIGHT.txt license/COPYRIGHT_HEADER.txt
 
 %changelog
+* Fri Nov 24 2023 Automatic Build System <autodist@mambasoft.it> 1.9.21-1mamba
+- automatic version update by autodist
+
 * Wed Nov 01 2023 Automatic Build System <autodist@mambasoft.it> 1.9.20-1mamba
 - automatic version update by autodist