diff --git a/src/conference/local-conference-event-handler-p.h b/src/conference/local-conference-event-handler-p.h
index b50af3ed7..0fffe1c55 100644
--- a/src/conference/local-conference-event-handler-p.h
+++ b/src/conference/local-conference-event-handler-p.h
@@ -24,6 +24,7 @@
 
 #include "local-conference-event-handler.h"
 #include "object/object-p.h"
+#include "xml/conference-info.h"
 
 LINPHONE_BEGIN_NAMESPACE
 
@@ -32,6 +33,7 @@ public:
 	void notifyFullState (const std::string &notify, LinphoneEvent *lev);
 	void notifyAllExcept (const std::string &notify, const Address &addr);
 	void notifyAll (const std::string &notify);
+	std::string createNotify (Xsd::ConferenceInfo::ConferenceType confInfo);
 	std::string createNotifyFullState ();
 	std::string createNotifyParticipantAdded (const Address &addr);
 	std::string createNotifyParticipantRemoved (const Address &addr);
@@ -40,10 +42,13 @@ public:
 	std::string createNotifyParticipantDeviceAdded (const Address &addr, const Address &gruu);
 	std::string createNotifyParticipantDeviceRemoved (const Address &addr, const Address &gruu);
 
+	inline unsigned int getLastNotify () const { return lastNotify; };
+
 private:
 	LinphoneCore *core = nullptr;
 	LocalConference *conf = nullptr;
-	
+	unsigned int lastNotify = 0;
+
 	void sendNotify (const std::string &notify, const Address &addr);
 
 	L_DECLARE_PUBLIC(LocalConferenceEventHandler);
diff --git a/src/conference/local-conference-event-handler.cpp b/src/conference/local-conference-event-handler.cpp
index 4c01fb859..fef59f0ef 100644
--- a/src/conference/local-conference-event-handler.cpp
+++ b/src/conference/local-conference-event-handler.cpp
@@ -21,11 +21,8 @@
 #include "conference/participant-p.h"
 #include "local-conference-event-handler-p.h"
 #include "object/object-p.h"
-
 #include "private.h"
 
-#include "xml/conference-info.h"
-
 // =============================================================================
 
 using namespace std;
@@ -44,14 +41,6 @@ static void doNotify (const string &notify, LinphoneEvent *lev) {
 	linphone_event_unref(lev);
 }
 
-static string createNotify (ConferenceType confInfo) {
-	stringstream notify;
-	Xsd::XmlSchema::NamespaceInfomap map;
-	map[""].name = "urn:ietf:params:xml:ns:conference-info";
-	serializeConferenceInfo(notify, confInfo, map);
-	return notify.str();
-}
-
 // -----------------------------------------------------------------------------
 
 void LocalConferenceEventHandlerPrivate::notifyFullState (const string &notify, LinphoneEvent *lev) {
@@ -76,6 +65,18 @@ void LocalConferenceEventHandlerPrivate::notifyAll (const string &notify) {
 	}
 }
 
+string LocalConferenceEventHandlerPrivate::createNotify (ConferenceType confInfo) {
+	if (confInfo.getVersion().present()) {
+		lastNotify = confInfo.getVersion().get() + 1;
+		confInfo.setVersion(lastNotify);
+	}
+	stringstream notify;
+	Xsd::XmlSchema::NamespaceInfomap map;
+	map[""].name = "urn:ietf:params:xml:ns:conference-info";
+	serializeConferenceInfo(notify, confInfo, map);
+	return notify.str();
+}
+
 string LocalConferenceEventHandlerPrivate::createNotifyFullState () {
 	string entity = conf->getConferenceAddress()->asStringUriOnly();
 	string subject = conf->getSubject();
@@ -248,6 +249,7 @@ LocalConferenceEventHandler::LocalConferenceEventHandler (LinphoneCore *core, Lo
 	xercesc::XMLPlatformUtils::Initialize();
 	d->conf = localConf;
 	d->core = core;
+	//init d->lastNotify = last notify
 }
 
 LocalConferenceEventHandler::~LocalConferenceEventHandler () {
diff --git a/src/conference/remote-conference-event-handler-p.h b/src/conference/remote-conference-event-handler-p.h
index 71c342c42..e89c454c1 100644
--- a/src/conference/remote-conference-event-handler-p.h
+++ b/src/conference/remote-conference-event-handler-p.h
@@ -26,11 +26,15 @@
 LINPHONE_BEGIN_NAMESPACE
 
 class RemoteConferenceEventHandlerPrivate : public ObjectPrivate {
+public:
+	inline unsigned int getLastNotify () const { return lastNotify; };
+
 private:
 	LinphoneCore *core = nullptr;
 	ConferenceListener *listener = nullptr;
 	Address confAddress;
 	LinphoneEvent *lev = nullptr;
+	unsigned int lastNotify = 0;
 
 	L_DECLARE_PUBLIC(RemoteConferenceEventHandler);
 };
diff --git a/src/conference/remote-conference-event-handler.cpp b/src/conference/remote-conference-event-handler.cpp
index 6f23d31f8..749cd5bed 100644
--- a/src/conference/remote-conference-event-handler.cpp
+++ b/src/conference/remote-conference-event-handler.cpp
@@ -38,6 +38,7 @@ RemoteConferenceEventHandler::RemoteConferenceEventHandler (LinphoneCore *core,
 	xercesc::XMLPlatformUtils::Initialize();
 	d->core = core;
 	d->listener = listener;
+	// TODO : d->lastNotify = lastNotify
 }
 
 RemoteConferenceEventHandler::~RemoteConferenceEventHandler () {
@@ -48,6 +49,7 @@ RemoteConferenceEventHandler::~RemoteConferenceEventHandler () {
 
 void RemoteConferenceEventHandler::subscribe (const Address &addr) {
 	L_D();
+	// TODO : add last notify
 	d->confAddress = addr;
 	LinphoneAddress *lAddr = linphone_address_new(d->confAddress.asString().c_str());
 	d->lev = linphone_core_create_subscribe(d->core, lAddr, "conference", 600);
@@ -76,6 +78,9 @@ void RemoteConferenceEventHandler::notifyReceived (string xmlBody) {
 		if (confInfo->getConferenceDescription().present() && confInfo->getConferenceDescription().get().getSubject().present())
 			d->listener->onSubjectChanged(confInfo->getConferenceDescription().get().getSubject().get());
 
+		if (confInfo->getVersion().present())
+			d->lastNotify = confInfo->getVersion().get();
+
 		if (!confInfo->getUsers().present())
 			return;