diff --git a/dist/changes-5.6.3 b/dist/changes-5.6.3
new file mode 100644
index 0000000000000000000000000000000000000000..dc731870b82e7a76a285909e548ad62677dd3dd2
--- /dev/null
+++ b/dist/changes-5.6.3
@@ -0,0 +1,24 @@
+Qt 5.6.3 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.6.0.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+  http://doc.qt.io/qt-5/index.html
+
+The Qt version 5.6 series is binary compatible with the 5.5.x series.
+Applications compiled for 5.5 will continue to run with 5.6.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+  https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+*                          Library                                         *
+****************************************************************************
+- QWebSocketHandshakeRequest
+   [QTBUG-57357] Fixed the parsing of port in handshake requests.
diff --git a/dist/changes-5.9.2 b/dist/changes-5.9.2
new file mode 100644
index 0000000000000000000000000000000000000000..83b029956279ce42fbd136d09a9d896f0b087842
--- /dev/null
+++ b/dist/changes-5.9.2
@@ -0,0 +1,18 @@
+Qt 5.9.2 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.9.0.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+http://doc.qt.io/qt-5/index.html
+
+The Qt version 5.9 series is binary compatible with the 5.8.x series.
+Applications compiled for 5.8 will continue to run with 5.9.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
diff --git a/examples/websockets/simplechat/chatclient.html b/examples/websockets/simplechat/chatclient.html
index 511d05b17a917c72d31cd63d2719b037046bf9c9..d2dbf47ffd6181a09b98fa49fe3218f14cb927e8 100644
--- a/examples/websockets/simplechat/chatclient.html
+++ b/examples/websockets/simplechat/chatclient.html
@@ -4,18 +4,21 @@
     </head>
     <body>
         <h1>WebSocket Chat Client</h1>
+        <p>
+            Host: <input id="webSocketHost" type="text" value="localhost:1234"/>
+        </p>
         <p>
             <button onClick="initWebSocket();">Connect</button>
-            <button onClick="stopWebSocket();">Disconnect</button>
+            <button id="disconnectButton" onClick="stopWebSocket();" disabled>Disconnect</button>
             <button onClick="checkSocket();">State</button>
         </p>
         <p>
-            <textarea id="debugTextArea" style="width:400px;height:200px;"></textarea>
+            <textarea id="debugTextArea" style="width:400px;height:200px;" readonly></textarea>
         </p>
         <p>
             <input type="text" id="inputNick" value="nickname" />
             <input type="text" id="inputText" onkeydown="if(event.keyCode==13)sendMessage();"/>
-            <button onClick="sendMessage();">Send</button>
+            <button id="sendButton" onClick="sendMessage();" disabled>Send</button>
         </p>
 
         <script type="text/javascript">
@@ -38,7 +41,6 @@
                 }
             }
 
-            var wsUri = "ws://localhost:1234";
             var websocket = null;
 
             function initWebSocket() {
@@ -47,12 +49,17 @@
                         WebSocket = MozWebSocket;
                     if ( websocket && websocket.readyState == 1 )
                         websocket.close();
+                    var wsUri = "ws://" + document.getElementById("webSocketHost").value;
                     websocket = new WebSocket( wsUri );
                     websocket.onopen = function (evt) {
                         debug("CONNECTED");
+                        document.getElementById("disconnectButton").disabled = false;
+                        document.getElementById("sendButton").disabled = false;
                     };
                     websocket.onclose = function (evt) {
                         debug("DISCONNECTED");
+                        document.getElementById("disconnectButton").disabled = true;
+                        document.getElementById("sendButton").disabled = true;
                     };
                     websocket.onmessage = function (evt) {
                         console.log( "Message received :", evt.data );
diff --git a/examples/websockets/simplechat/chatserver.cpp b/examples/websockets/simplechat/chatserver.cpp
index 50d262539067544367255315c5ea4c66aed6f65c..8885fe838aa120f9b5fd2fb2ad69ff4e32a2a110 100644
--- a/examples/websockets/simplechat/chatserver.cpp
+++ b/examples/websockets/simplechat/chatserver.cpp
@@ -48,23 +48,31 @@
 **
 ****************************************************************************/
 #include "chatserver.h"
-#include "QtWebSockets/QWebSocketServer"
-#include "QtWebSockets/QWebSocket"
-#include <QtCore/QDebug>
+
+#include <QtWebSockets>
+#include <QtCore>
+
+#include <cstdio>
+using namespace std;
 
 QT_USE_NAMESPACE
 
+static QString getIdentifier(QWebSocket *peer)
+{
+    return QStringLiteral("%1:%2").arg(peer->peerAddress().toString(),
+                                       QString::number(peer->peerPort()));
+}
+
 //! [constructor]
 ChatServer::ChatServer(quint16 port, QObject *parent) :
     QObject(parent),
-    m_pWebSocketServer(nullptr)
+    m_pWebSocketServer(new QWebSocketServer(QStringLiteral("Chat Server"),
+                                            QWebSocketServer::NonSecureMode,
+                                            this))
 {
-    m_pWebSocketServer = new QWebSocketServer(QStringLiteral("Chat Server"),
-                                              QWebSocketServer::NonSecureMode,
-                                              this);
     if (m_pWebSocketServer->listen(QHostAddress::Any, port))
     {
-        qDebug() << "Chat Server listening on port" << port;
+        QTextStream(stdout) << "Chat Server listening on port " << port << '\n';
         connect(m_pWebSocketServer, &QWebSocketServer::newConnection,
                 this, &ChatServer::onNewConnection);
     }
@@ -73,31 +81,32 @@ ChatServer::ChatServer(quint16 port, QObject *parent) :
 ChatServer::~ChatServer()
 {
     m_pWebSocketServer->close();
-    qDeleteAll(m_clients.begin(), m_clients.end());
 }
 //! [constructor]
 
 //! [onNewConnection]
 void ChatServer::onNewConnection()
 {
-    QWebSocket *pSocket = m_pWebSocketServer->nextPendingConnection();
+    auto pSocket = m_pWebSocketServer->nextPendingConnection();
+    QTextStream(stdout) << getIdentifier(pSocket) << " connected!\n";
+    pSocket->setParent(this);
 
-    connect(pSocket, &QWebSocket::textMessageReceived, this, &ChatServer::processMessage);
-    connect(pSocket, &QWebSocket::disconnected, this, &ChatServer::socketDisconnected);
+    connect(pSocket, &QWebSocket::textMessageReceived,
+            this, &ChatServer::processMessage);
+    connect(pSocket, &QWebSocket::disconnected,
+            this, &ChatServer::socketDisconnected);
 
     m_clients << pSocket;
 }
 //! [onNewConnection]
 
 //! [processMessage]
-void ChatServer::processMessage(QString message)
+void ChatServer::processMessage(const QString &message)
 {
     QWebSocket *pSender = qobject_cast<QWebSocket *>(sender());
     for (QWebSocket *pClient : qAsConst(m_clients)) {
         if (pClient != pSender) //don't echo message back to sender
-        {
             pClient->sendTextMessage(message);
-        }
     }
 }
 //! [processMessage]
@@ -106,6 +115,7 @@ void ChatServer::processMessage(QString message)
 void ChatServer::socketDisconnected()
 {
     QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
+    QTextStream(stdout) << getIdentifier(pClient) << " disconnected!\n";
     if (pClient)
     {
         m_clients.removeAll(pClient);
diff --git a/examples/websockets/simplechat/chatserver.h b/examples/websockets/simplechat/chatserver.h
index 43ce306c020d874254f712256650ed9eed54446f..4a8285b055292735f1f329246b8d5a900683df72 100644
--- a/examples/websockets/simplechat/chatserver.h
+++ b/examples/websockets/simplechat/chatserver.h
@@ -52,10 +52,10 @@
 
 #include <QtCore/QObject>
 #include <QtCore/QList>
-#include <QtCore/QByteArray>
 
 QT_FORWARD_DECLARE_CLASS(QWebSocketServer)
 QT_FORWARD_DECLARE_CLASS(QWebSocket)
+QT_FORWARD_DECLARE_CLASS(QString)
 
 class ChatServer : public QObject
 {
@@ -64,9 +64,9 @@ public:
     explicit ChatServer(quint16 port, QObject *parent = nullptr);
     virtual ~ChatServer();
 
-private Q_SLOTS:
+private slots:
     void onNewConnection();
-    void processMessage(QString message);
+    void processMessage(const QString &message);
     void socketDisconnected();
 
 private:
diff --git a/examples/websockets/simplechat/main.cpp b/examples/websockets/simplechat/main.cpp
index 0b1c753387e0c0e9b4cb944e7177c6f0bd692de9..a1ffb4926c2d32d9e09d9a38cef962b74c4531f0 100644
--- a/examples/websockets/simplechat/main.cpp
+++ b/examples/websockets/simplechat/main.cpp
@@ -48,6 +48,7 @@
 **
 ****************************************************************************/
 #include <QtCore/QCoreApplication>
+
 #include "chatserver.h"
 
 int main(int argc, char *argv[])
diff --git a/src/imports/qmlwebsockets/qqmlwebsocket.h b/src/imports/qmlwebsockets/qqmlwebsocket.h
index c3a808fee3f30ea4ef188b2f63a6212a3cedc28b..8db435d536823175311c2465e60ad173a492eeaa 100644
--- a/src/imports/qmlwebsockets/qqmlwebsocket.h
+++ b/src/imports/qmlwebsockets/qqmlwebsocket.h
@@ -54,7 +54,6 @@ class QQmlWebSocket : public QObject, public QQmlParserStatus
     Q_DISABLE_COPY(QQmlWebSocket)
     Q_INTERFACES(QQmlParserStatus)
 
-    Q_ENUMS(Status)
     Q_PROPERTY(QUrl url READ url WRITE setUrl NOTIFY urlChanged)
     Q_PROPERTY(Status status READ status NOTIFY statusChanged)
     Q_PROPERTY(QString errorString READ errorString NOTIFY errorStringChanged)
@@ -73,6 +72,7 @@ public:
         Closed      = 3,
         Error       = 4
     };
+    Q_ENUM(Status)
 
     QUrl url() const;
     void setUrl(const QUrl &url);
diff --git a/src/websockets/qwebsocket_p.cpp b/src/websockets/qwebsocket_p.cpp
index 52538040310cf0058d856c8c886189ebb8e7acc7..5e1a10321b98cf84f772664b2de402ff581f1917 100644
--- a/src/websockets/qwebsocket_p.cpp
+++ b/src/websockets/qwebsocket_p.cpp
@@ -633,7 +633,7 @@ void QWebSocketPrivate::makeConnections(const QTcpSocket *pTcpSocket)
 void QWebSocketPrivate::releaseConnections(const QTcpSocket *pTcpSocket)
 {
     if (Q_LIKELY(pTcpSocket))
-        pTcpSocket->disconnect(pTcpSocket);
+        pTcpSocket->disconnect();
     m_dataProcessor.disconnect();
 }
 
@@ -1011,7 +1011,7 @@ void QWebSocketPrivate::processHandshake(QTcpSocket *pSocket)
                 if (!ok)
                     errorDescription =
                       QWebSocket::tr("Accept-Key received from server %1 does not match the client key %2.")
-                            .arg(acceptKey).arg(accept);
+                            .arg(acceptKey, accept);
             } else {
                 errorDescription =
                     QWebSocket::tr("QWebSocketPrivate::processHandshake: Invalid statusline in response: %1.")
@@ -1145,7 +1145,8 @@ void QWebSocketPrivate::socketDestroyed(QObject *socket)
  */
 void QWebSocketPrivate::processData()
 {
-    Q_ASSERT(m_pSocket);
+    if (!m_pSocket) // disconnected with data still in-bound
+        return;
     while (m_pSocket->bytesAvailable()) {
         if (state() == QAbstractSocket::ConnectingState) {
             if (!m_pSocket->canReadLine())
diff --git a/src/websockets/qwebsockethandshakerequest.cpp b/src/websockets/qwebsockethandshakerequest.cpp
index ddeee2d24ec94710f4f6c58dd590689da94f68a8..e6a626c266c5c43f0f74c762b12b7ee38ec94d0f 100644
--- a/src/websockets/qwebsockethandshakerequest.cpp
+++ b/src/websockets/qwebsockethandshakerequest.cpp
@@ -318,17 +318,17 @@ void QWebSocketHandshakeRequest::readHandshake(QTextStream &textStream, int maxH
     //optional headers
     m_origin = m_headers.value(QStringLiteral("origin"), QString());
     const QStringList protocolLines = m_headers.values(QStringLiteral("sec-websocket-protocol"));
-    for (QStringList::const_iterator pl = protocolLines.begin(); pl != protocolLines.end(); ++pl) {
-        QStringList protocols = (*pl).split(QStringLiteral(","), QString::SkipEmptyParts);
-        for (QStringList::const_iterator p = protocols.begin(); p != protocols.end(); ++p)
-            m_protocols << (*p).trimmed();
+    for (const QString& pl : protocolLines) {
+        const QStringList protocols = pl.split(QStringLiteral(","), QString::SkipEmptyParts);
+        for (const QString& p : protocols)
+            m_protocols << p.trimmed();
     }
+
     const QStringList extensionLines = m_headers.values(QStringLiteral("sec-websocket-extensions"));
-    for (QStringList::const_iterator el = extensionLines.begin();
-         el != extensionLines.end(); ++el) {
-        QStringList extensions = (*el).split(QStringLiteral(","), QString::SkipEmptyParts);
-        for (QStringList::const_iterator e = extensions.begin(); e != extensions.end(); ++e)
-            m_extensions << (*e).trimmed();
+    for (const QString& el : extensionLines) {
+        const QStringList extensions = el.split(QStringLiteral(","), QString::SkipEmptyParts);
+        for (const QString& e : extensions)
+            m_extensions << e.trimmed();
     }
 
     //TODO: authentication field
diff --git a/src/websockets/qwebsocketserver.h b/src/websockets/qwebsocketserver.h
index 8a78c57f740d95ec54b6507d392acabec5845c6a..decd7c35d34f70b17acf4391255aef068e8ebb4a 100644
--- a/src/websockets/qwebsocketserver.h
+++ b/src/websockets/qwebsocketserver.h
@@ -65,8 +65,6 @@ class Q_WEBSOCKETS_EXPORT QWebSocketServer : public QObject
     Q_DISABLE_COPY(QWebSocketServer)
     Q_DECLARE_PRIVATE(QWebSocketServer)
 
-    Q_ENUMS(SslMode)
-
 public:
     enum SslMode {
 #ifndef QT_NO_SSL
@@ -74,6 +72,7 @@ public:
 #endif
         NonSecureMode = 1
     };
+    Q_ENUM(SslMode)
 
     explicit QWebSocketServer(const QString &serverName, SslMode secureMode,
                               QObject *parent = nullptr);