diff --git a/libbytesize.spec b/libbytesize.spec
index 7a58a3a..e9e7054 100644
--- a/libbytesize.spec
+++ b/libbytesize.spec
@@ -1,6 +1,6 @@
 Name:          libbytesize
 Version:       2.9
-Release:       1mamba
+Release:       2mamba
 Summary:       A tiny library providing a C "class" for working with arbitrary big sizes in bytes
 Group:         System/Libraries
 Vendor:        openmamba
@@ -14,8 +14,9 @@ BuildRequires: glibc-devel
 BuildRequires: libgmp-devel
 BuildRequires: libmpfr-devel
 BuildRequires: libpcre2-devel
-BuildRequires: libpython3-devel
+BuildRequires: libpython311-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libpython3-devel >= 3.11
 
 %description
 A tiny library providing a C "class" for working with arbitrary big sizes in bytes.
@@ -73,6 +74,9 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Mon Oct 16 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 2.9-2mamba
+- rebuilt with python3 == 3.11
+
 * Fri Jul 07 2023 Automatic Build System <autodist@mambasoft.it> 2.9-1mamba
 - automatic version update by autodist