diff --git a/libethcore/CommonEth.cpp b/libethcore/CommonEth.cpp
index e68839ed5..5f9332ad8 100644
--- a/libethcore/CommonEth.cpp
+++ b/libethcore/CommonEth.cpp
@@ -33,7 +33,7 @@ namespace dev
 namespace eth
 {
 
-const unsigned c_protocolVersion = 47;
+const unsigned c_protocolVersion = 48;
 const unsigned c_databaseVersion = 5;
 
 static const vector<pair<u256, string>> g_units =