diff --git a/libphonenumber.spec b/libphonenumber.spec
index 3b0ee1a..10b884a 100644
--- a/libphonenumber.spec
+++ b/libphonenumber.spec
@@ -1,6 +1,6 @@
 Name:          libphonenumber
 Version:       8.13.34
-Release:       1mamba
+Release:       2mamba
 Summary:       Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers
 Group:         System/Libraries
 Vendor:        openmamba
@@ -20,8 +20,7 @@ BuildRequires: libprotobuf-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: libabseil-cpp-devel >= 20240116.0-1mamba
-BuildRequires: libprotobuf-devel >= 21.4
-
+BuildRequires: libprotobuf-devel >= 26.1
 %description
 Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
 
@@ -77,6 +76,9 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Mon Apr 15 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 8.13.34-2mamba
+- rebuilt with protobuf 26.1
+
 * Sat Apr 06 2024 Automatic Build System <autodist@openmamba.org> 8.13.34-1mamba
 - automatic version update by autodist