diff --git a/audioconverter.cpp b/audioconverter.cpp
index edc6ec7..a835050 100644
--- a/audioconverter.cpp
+++ b/audioconverter.cpp
@@ -2,7 +2,8 @@
 #include "logcategories.h"
 #include "ulaw.h"
 
-audioConverter::audioConverter(){
+audioConverter::audioConverter(QObject* parent) : QObject(parent) 
+{
 }
 
 bool audioConverter::init(QAudioFormat inFormat, QAudioFormat outFormat, quint8 opusComplexity, quint8 resampleQuality)
diff --git a/audioconverter.h b/audioconverter.h
index cd598b4..8c784f0 100644
--- a/audioconverter.h
+++ b/audioconverter.h
@@ -35,7 +35,7 @@ class audioConverter : public QObject
     Q_OBJECT
 
 public:
-    audioConverter();
+    explicit audioConverter(QObject* parent = nullptr);;
     ~audioConverter();
 
 public slots:
diff --git a/audiohandler.cpp b/audiohandler.cpp
index b4678e3..95b2de5 100644
--- a/audiohandler.cpp
+++ b/audiohandler.cpp
@@ -10,7 +10,7 @@
 
 
 
-audioHandler::audioHandler(QObject* parent) 
+audioHandler::audioHandler(QObject* parent) : QObject(parent)
 {
 	Q_UNUSED(parent)
 }
@@ -112,7 +112,7 @@ bool audioHandler::init(audioSetup setup)
 
 	// We "hopefully" now have a valid format that is supported so try connecting
 
-	converter = new audioConverter();
+	converter = new audioConverter(this);
 	converterThread = new QThread(this);
 	if (setup.isinput) {
 		converterThread->setObjectName("audioConvIn()");
diff --git a/audiohandler.h b/audiohandler.h
index c5ac1e7..f9ec2a1 100644
--- a/audiohandler.h
+++ b/audiohandler.h
@@ -78,7 +78,7 @@ class audioHandler : public QObject
     Q_OBJECT
 
 public:
-    audioHandler(QObject* parent = 0);
+    explicit audioHandler(QObject* parent = nullptr);
     ~audioHandler();
 
     int getLatency();
diff --git a/commhandler.cpp b/commhandler.cpp
index fd0f381..be6fb5b 100644
--- a/commhandler.cpp
+++ b/commhandler.cpp
@@ -5,7 +5,7 @@
 
 // Copyright 2017-2020 Elliott H. Liggett
 
-commHandler::commHandler()
+commHandler::commHandler(QObject* parent) : QObject(parent)
 {
     //constructor
     // grab baud rate and other comm port details
@@ -31,7 +31,7 @@ commHandler::commHandler()
     connect(port, SIGNAL(readyRead()), this, SLOT(receiveDataIn()));
 }
 
-commHandler::commHandler(QString portName, quint32 baudRate, quint8 wfFormat)
+commHandler::commHandler(QString portName, quint32 baudRate, quint8 wfFormat, QObject* parent) : QObject(parent)
 {
     //constructor
     // grab baud rate and other comm port details
diff --git a/commhandler.h b/commhandler.h
index 4baeacd..5546175 100644
--- a/commhandler.h
+++ b/commhandler.h
@@ -15,8 +15,8 @@ class commHandler : public QObject
     Q_OBJECT
 
 public:
-    commHandler();
-    commHandler(QString portName, quint32 baudRate, quint8 wfFormat);
+    commHandler(QObject* parent = nullptr);
+    commHandler(QString portName, quint32 baudRate, quint8 wfFormat,QObject* parent = nullptr);
     bool serialError;
     bool rtsStatus();
 
diff --git a/pttyhandler.cpp b/pttyhandler.cpp
index 0639bc0..60ea0ae 100644
--- a/pttyhandler.cpp
+++ b/pttyhandler.cpp
@@ -13,7 +13,7 @@
 
 // Copyright 2017-2021 Elliott H. Liggett & Phil Taylor 
 
-pttyHandler::pttyHandler(QString pty)
+pttyHandler::pttyHandler(QString pty, QObject* parent) : QObject(parent)
 {
     //constructor
     if (pty == "" || pty.toLower() == "none")
diff --git a/pttyhandler.h b/pttyhandler.h
index 3c18206..d056e77 100644
--- a/pttyhandler.h
+++ b/pttyhandler.h
@@ -19,7 +19,7 @@ class pttyHandler : public QObject
     Q_OBJECT
 
 public:
-    pttyHandler(QString portName);
+    explicit pttyHandler(QString portName, QObject* parent = nullptr);
     pttyHandler(QString portName, quint32 baudRate);
     bool serialError;
 
diff --git a/rigcommander.cpp b/rigcommander.cpp
index d4768f8..60efd9f 100644
--- a/rigcommander.cpp
+++ b/rigcommander.cpp
@@ -20,13 +20,13 @@
 
 // Note: When sending \x00, must use QByteArray.setRawData()
 
-rigCommander::rigCommander()
+rigCommander::rigCommander(QObject* parent) : QObject(parent)
 {
     qInfo(logRig()) << "creating instance of rigCommander()";
     state.set(SCOPEFUNC, true, false);
 }
 
-rigCommander::rigCommander(quint8 guid[GUIDLEN])
+rigCommander::rigCommander(quint8 guid[GUIDLEN], QObject* parent) : QObject(parent)
 {
     qInfo(logRig()) << "creating instance of rigCommander()";
     state.set(SCOPEFUNC, true, false);
@@ -59,8 +59,8 @@ void rigCommander::commSetup(unsigned char rigCivAddr, QString rigSerialPort, qu
     this->rigBaudRate = rigBaudRate;
     rigCaps.baudRate = rigBaudRate;
 
-    comm = new commHandler(rigSerialPort, rigBaudRate,wf);
-    ptty = new pttyHandler(vsp);
+    comm = new commHandler(rigSerialPort, rigBaudRate,wf,this);
+    ptty = new pttyHandler(vsp,this);
 
     if (tcpPort > 0) {
         tcp = new tcpServer(this);
@@ -132,7 +132,7 @@ void rigCommander::commSetup(unsigned char rigCivAddr, udpPreferences prefs, aud
         //this->rigSerialPort = rigSerialPort;
         //this->rigBaudRate = rigBaudRate;
 
-        ptty = new pttyHandler(vsp);
+        ptty = new pttyHandler(vsp,this);
 
         if (tcpPort > 0) {
             tcp = new tcpServer(this);
diff --git a/rigcommander.h b/rigcommander.h
index dc1b153..7921b24 100644
--- a/rigcommander.h
+++ b/rigcommander.h
@@ -69,8 +69,8 @@ class rigCommander : public QObject
     Q_OBJECT
 
 public:
-    rigCommander();
-    rigCommander(quint8 guid[GUIDLEN]);
+    explicit rigCommander(QObject* parent=nullptr);
+    explicit rigCommander(quint8 guid[GUIDLEN], QObject* parent = nullptr);
     ~rigCommander();
 
     bool usingLAN();
diff --git a/rigctld.h b/rigctld.h
index d86818d..2018576 100644
--- a/rigctld.h
+++ b/rigctld.h
@@ -326,7 +326,7 @@ class rigCtlD : public QTcpServer
     Q_OBJECT
 
 public:
-    explicit rigCtlD(QObject *parent=Q_NULLPTR);
+    explicit rigCtlD(QObject *parent=nullptr);
     virtual ~rigCtlD();
 
     int startServer(qint16 port);
diff --git a/servermain.cpp b/servermain.cpp
index 2db93d3..8802cb7 100644
--- a/servermain.cpp
+++ b/servermain.cpp
@@ -102,7 +102,7 @@ void servermain::makeRig()
         if (radio->rigThread == Q_NULLPTR)
         {
             qInfo(logSystem()) << "Creating new rigThread()";
-            radio->rig = new rigCommander(radio->guid);
+            radio->rig = new rigCommander(radio->guid,this);
             radio->rigThread = new QThread(this);
             radio->rigThread->setObjectName("rigCommander()");
 
@@ -376,7 +376,7 @@ void servermain::setServerToPrefs()
         udp = Q_NULLPTR;
     }
 
-    udp = new udpServer(&serverConfig);
+    udp = new udpServer(&serverConfig,this);
 
     serverThread = new QThread(this);
     serverThread->setObjectName("udpServer()");
diff --git a/udphandler.cpp b/udphandler.cpp
index 2413bc0..a235e16 100644
--- a/udphandler.cpp
+++ b/udphandler.cpp
@@ -921,7 +921,7 @@ udpAudio::udpAudio(QHostAddress local, QHostAddress ip, quint16 audioPort, quint
 
     QUdpSocket::connect(udp, &QUdpSocket::readyRead, this, &udpAudio::dataReceived);
 
-    rxaudio = new audioHandler();
+    rxaudio = new audioHandler(this);
     rxAudioThread = new QThread(this);
     rxAudioThread->setObjectName("rxAudio()");
 
@@ -946,7 +946,7 @@ udpAudio::udpAudio(QHostAddress local, QHostAddress ip, quint16 audioPort, quint
     pingTimer->start(PING_PERIOD); // send ping packets every 100ms
 
     if (enableTx) {
-        txaudio = new audioHandler();
+        txaudio = new audioHandler(this);
         txAudioThread = new QThread(this);
         rxAudioThread->setObjectName("txAudio()");
 
diff --git a/udpserver.cpp b/udpserver.cpp
index 74ed8e4..0387fc0 100644
--- a/udpserver.cpp
+++ b/udpserver.cpp
@@ -4,8 +4,9 @@
 #define STALE_CONNECTION 15
 #define LOCK_PERIOD 10 // time to attempt to lock Mutex in ms
 #define AUDIO_SEND_PERIOD 20 //
-udpServer::udpServer(SERVERCONFIG* config) :
-    config(config)
+udpServer::udpServer(SERVERCONFIG* config, QObject* parent) :
+    config(config),
+    QObject(parent)
 {
     qInfo(logUdpServer()) << "Starting udp server";
 }
@@ -366,7 +367,7 @@ void udpServer::controlReceived()
 
                     outAudio.isinput = false;
 
-                    radio->txaudio = new audioHandler();
+                    radio->txaudio = new audioHandler(this);
                     radio->txAudioThread = new QThread(this);
                     radio->txAudioThread->setObjectName("txAudio()");
 
@@ -408,7 +409,7 @@ void udpServer::controlReceived()
                     radio->rxAudioSetup.isinput = true;
                     memcpy(radio->rxAudioSetup.guid, radio->guid, GUIDLEN);
 
-                    radio->rxaudio = new audioHandler();
+                    radio->rxaudio = new audioHandler(this);
 
                     radio->rxAudioThread = new QThread(this);
                     radio->rxAudioThread->setObjectName("rxAudio()");
diff --git a/udpserver.h b/udpserver.h
index 9fd4f4a..fe1682b 100644
--- a/udpserver.h
+++ b/udpserver.h
@@ -99,7 +99,7 @@ class udpServer : public QObject
 	Q_OBJECT
 
 public:
-	udpServer(SERVERCONFIG* config);
+	explicit udpServer(SERVERCONFIG* config, QObject* parent = nullptr);
 	~udpServer();
 
 public slots:
diff --git a/wfmain.cpp b/wfmain.cpp
index 26b86a0..3dac678 100644
--- a/wfmain.cpp
+++ b/wfmain.cpp
@@ -405,7 +405,7 @@ void wfmain::makeRig()
 {
     if (rigThread == Q_NULLPTR)
     {
-        rig = new rigCommander();
+        rig = new rigCommander(this);
         rigThread = new QThread(this);
         rigThread->setObjectName("rigCommander()");
 
@@ -993,7 +993,7 @@ void wfmain::setServerToPrefs()
     if (serverConfig.enabled) {
         serverConfig.lan = prefs.enableLAN;
 
-        udp = new udpServer(&serverConfig);
+        udp = new udpServer(&serverConfig,this);
 
         serverThread = new QThread(this);