diff --git a/libphonenumber.spec b/libphonenumber.spec
index 8694f07..c8777af 100644
--- a/libphonenumber.spec
+++ b/libphonenumber.spec
@@ -1,5 +1,5 @@
 Name:          libphonenumber
-Version:       8.12.50
+Version:       8.12.52
 Release:       1mamba
 Summary:       Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers
 Group:         System/Libraries
@@ -20,6 +20,7 @@ BuildRequires: libprotobuf-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: libprotobuf-devel >= 3.20.1
+BuildRequires: libabseil-cpp-devel >= 20220623.0
 
 %description
 Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
@@ -36,10 +37,11 @@ This package contains libraries and header files for developing applications tha
 
 %prep
 %setup -q
-%patch0 -p1 -b .system-abseil-cpp
+#%patch0 -p1 -b .system-abseil-cpp
 
 %build
 %cmake -d build \
+  -DCMAKE_CXX_STANDARD=17 \
   ../cpp
 
 %make
@@ -72,6 +74,12 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Sat Jul 23 2022 Automatic Build System <autodist@mambasoft.it> 8.12.52-1mamba
+- automatic version update by autodist
+
+* Mon Jul 11 2022 Automatic Build System <autodist@mambasoft.it> 8.12.51-1mamba
+- automatic version update by autodist
+
 * Mon Jun 13 2022 Automatic Build System <autodist@mambasoft.it> 8.12.50-1mamba
 - automatic version update by autodist