diff --git a/libethereum/Common.h b/libethereum/Common.h
index 98f7707f5..df1d8569e 100644
--- a/libethereum/Common.h
+++ b/libethereum/Common.h
@@ -24,7 +24,7 @@
 #pragma once
 
 // define version
-#define ETH_VERSION 0.4.0
+#define ETH_VERSION 0.3.11
 
 // way to many uint to size_t warnings in 32 bit build
 #ifdef _M_IX86
diff --git a/libethereum/PeerNetwork.cpp b/libethereum/PeerNetwork.cpp
index 3bc9cdcc0..713441de4 100644
--- a/libethereum/PeerNetwork.cpp
+++ b/libethereum/PeerNetwork.cpp
@@ -43,7 +43,7 @@ using namespace eth;
 
 #define clogS(X) eth::LogOutputStream<X, true>(false) << "| " << std::setw(2) << m_socket.native_handle() << "] "
 
-static const int c_protocolVersion = 7;
+static const int c_protocolVersion = 8;
 
 static const eth::uint c_maxHashes = 32;		///< Maximum number of hashes GetChain will ever send.
 static const eth::uint c_maxBlocks = 32;		///< Maximum number of blocks Blocks will ever send. BUG: if this gets too big (e.g. 2048) stuff starts going wrong.