diff --git a/libphonenumber.spec b/libphonenumber.spec
index 9118dd8..65d3985 100644
--- a/libphonenumber.spec
+++ b/libphonenumber.spec
@@ -1,5 +1,5 @@
 Name:          libphonenumber
-Version:       8.12.22
+Version:       8.12.23
 Release:       1mamba
 Summary:       Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers
 Group:         System/Libraries
@@ -17,7 +17,7 @@ BuildRequires: libicu-devel
 BuildRequires: libprotobuf-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
-BuildRequires: libprotobuf-devel >= 3.12.0
+BuildRequires: libprotobuf-devel >= 3.17.0
 
 %description
 Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
@@ -69,6 +69,9 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Sat May 15 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 8.12.23-1mamba
+- update to 8.12.23
+
 * Sun May 02 2021 Automatic Build System <autodist@mambasoft.it> 8.12.22-1mamba
 - automatic version update by autodist