diff --git a/libphonenumber.spec b/libphonenumber.spec
index c8777af..4079d8b 100644
--- a/libphonenumber.spec
+++ b/libphonenumber.spec
@@ -1,5 +1,5 @@
 Name:          libphonenumber
-Version:       8.12.52
+Version:       8.12.53
 Release:       1mamba
 Summary:       Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers
 Group:         System/Libraries
@@ -19,7 +19,7 @@ BuildRequires: libicu-devel
 BuildRequires: libprotobuf-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
-BuildRequires: libprotobuf-devel >= 3.20.1
+BuildRequires: libprotobuf-devel >= 21.4
 BuildRequires: libabseil-cpp-devel >= 20220623.0
 
 %description
@@ -74,6 +74,12 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Sun Aug 14 2022 Automatic Build System <autodist@mambasoft.it> 8.12.53-1mamba
+- automatic version update by autodist
+
+* Sat Aug 06 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 8.12.52-2mamba
+- rebuilt with protobuf 21.4
+
 * Sat Jul 23 2022 Automatic Build System <autodist@mambasoft.it> 8.12.52-1mamba
 - automatic version update by autodist