diff --git a/src/net/common/servergamestate.cpp b/src/net/common/servergamestate.cpp
index eec896a7..fdfd2454 100644
--- a/src/net/common/servergamestate.cpp
+++ b/src/net/common/servergamestate.cpp
@@ -308,6 +308,11 @@ ServerGameStateInit::HandleNewSession(ServerGameThread &server, SessionWrapper s
 		{
 			server.MoveSessionToLobby(session, NTF_NET_REMOVED_GAME_FULL);
 		}
+		// Check whether the client supports the current game.
+		else if (curNumPlayers >= session.sessionData->GetMaxNumPlayers())
+		{
+			server.MoveSessionToLobby(session, NTF_NET_NEW_RELEASE_AVAILABLE);
+		}
 		else
 		{
 			if (session.playerData->GetUniqueId() == server.GetAdminPlayerId())
diff --git a/src/net/common/serverlobbythread.cpp b/src/net/common/serverlobbythread.cpp
index abae58c9..a185da1b 100644
--- a/src/net/common/serverlobbythread.cpp
+++ b/src/net/common/serverlobbythread.cpp
@@ -568,6 +568,10 @@ ServerLobbyThread::HandleNetPacketInit(SessionWrapper session, const NetPacketIn
 		SessionError(session, ERR_NET_VERSION_NOT_SUPPORTED);
 		return;
 	}
+	if (initData.versionMajor == 5 && (initData.versionMinor == 0 || initData.versionMinor == 1))
+		session.sessionData->SetMaxNumPlayers(7);
+	else
+		session.sessionData->SetMaxNumPlayers(MAX_NUMBER_OF_PLAYERS);
 
 	// Check the server password.
 	if (!CheckPassword(initData.password))
diff --git a/src/net/common/sessiondata.cpp b/src/net/common/sessiondata.cpp
index 32de4cdf..934d4f02 100644
--- a/src/net/common/sessiondata.cpp
+++ b/src/net/common/sessiondata.cpp
@@ -22,7 +22,8 @@
 
 SessionData::SessionData(SOCKET sockfd, SessionId id, boost::shared_ptr<SenderInterface> sender, SessionDataCallback &cb, boost::asio::io_service &ioService)
 : m_id(id), m_state(SessionData::Init), m_readyFlag(false),
-  m_wantsLobbyMsg(true), m_activityTimeoutNoticeSent(false), m_callback(cb)
+  m_wantsLobbyMsg(true), m_activityTimeoutNoticeSent(false), m_callback(cb),
+  m_maxNumPlayers(0)
 {
 	m_socket.reset(new boost::asio::ip::tcp::socket(
 		ioService, boost::asio::ip::tcp::v6(), sockfd));
@@ -173,3 +174,16 @@ SessionData::GetAutoDisconnectTimerElapsedSec() const
 	return m_autoDisconnectTimer.elapsed().total_seconds();
 }
 
+unsigned
+SessionData::GetMaxNumPlayers() const
+{
+	boost::mutex::scoped_lock lock(m_dataMutex);
+	return m_maxNumPlayers;
+}
+
+void
+SessionData::SetMaxNumPlayers(unsigned numPlayers)
+{
+	boost::mutex::scoped_lock lock(m_dataMutex);
+	m_maxNumPlayers = numPlayers;
+}
diff --git a/src/net/netpacket.h b/src/net/netpacket.h
index 3c4e25c0..d8f4d9f8 100644
--- a/src/net/netpacket.h
+++ b/src/net/netpacket.h
@@ -31,7 +31,7 @@
 #include <list>
 
 #define NET_VERSION_MAJOR			5
-#define NET_VERSION_MINOR			1
+#define NET_VERSION_MINOR			2
 
 #define MIN_PACKET_SIZE				4
 #define MAX_PACKET_SIZE				268
diff --git a/src/net/sessiondata.h b/src/net/sessiondata.h
index c4dba413..ee792ea8 100644
--- a/src/net/sessiondata.h
+++ b/src/net/sessiondata.h
@@ -71,6 +71,9 @@ public:
 	void MarkActivityNotice();
 	unsigned GetAutoDisconnectTimerElapsedSec() const;
 
+	unsigned GetMaxNumPlayers() const;
+	void SetMaxNumPlayers(unsigned numPlayers);
+
 private:
 	boost::shared_ptr<boost::asio::ip::tcp::socket> m_socket;
 	const SessionId					m_id;
@@ -84,6 +87,7 @@ private:
 	boost::timers::portable::microsec_timer m_autoDisconnectTimer;
 	boost::shared_ptr<SenderInterface>	m_sender;
 	SessionDataCallback				&m_callback;
+	unsigned						m_maxNumPlayers;
 
 	mutable boost::mutex			m_dataMutex;
 };