diff --git a/bitcoin.spec b/bitcoin.spec
index 2978a19..fe81265 100644
--- a/bitcoin.spec
+++ b/bitcoin.spec
@@ -1,7 +1,7 @@
 %define maj123ver %(echo %version | cut -d. -f1-3)
 Name:          bitcoin
 Version:       0.16.2
-Release:       1mamba
+Release:       2mamba
 Summary:       A frontend for the bitcoin cryptocurrency
 Group:         Graphical Desktop/Applications/Other
 Vendor:        openmamba
@@ -24,7 +24,7 @@ BuildRequires: libstdc++6-devel
 BuildRequires: miniupnpc-devel
 ## AUTOBUILDREQ-END
 BuildRequires: miniupnpc-devel >= 1.9.20150206-1mamba
-BuildRequires: protobuf-devel
+BuildRequires: protobuf-devel >= 1.6.1
 Conflicts:     bitcoinclassic
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 Obsoletes:     bitcoin-qt
@@ -112,6 +112,9 @@ exit 0
 %{_libdir}/pkgconfig/libbitcoinconsensus.pc
 
 %changelog
+* Tue Sep 04 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 0.16.2-2mamba
+- rebuilt with libprotobuf 1.6.1
+
 * Tue Aug 28 2018 Automatic Build System <autodist@mambasoft.it> 0.16.2-1mamba
 - automatic version update by autodist