diff --git a/qt5/platforminputcontext/fcitxwatcher.cpp b/qt5/platforminputcontext/fcitxwatcher.cpp
index 1fde40e..2513e7d 100644
--- a/qt5/platforminputcontext/fcitxwatcher.cpp
+++ b/qt5/platforminputcontext/fcitxwatcher.cpp
@@ -72,9 +72,8 @@ QString socketFile() {
 }
 
 FcitxWatcher::FcitxWatcher(QDBusConnection sessionBus, QObject *parent)
-    : QObject(parent), m_fsWatcher(new QFileSystemWatcher(this)),
-      m_serviceWatcher(new QDBusServiceWatcher(this)), m_connection(nullptr),
-      m_sessionBus(sessionBus), m_socketFile(socketFile()),
+    : QObject(parent), m_connection(nullptr), m_sessionBus(sessionBus),
+      m_socketFile(socketFile()),
       m_serviceName(QString("org.fcitx.Fcitx-%1").arg(displayNumber())),
       m_availability(false) {}
 
@@ -118,6 +117,7 @@ void FcitxWatcher::watch() {
         return;
     }
 
+    m_serviceWatcher = new QDBusServiceWatcher(this);
     connect(m_serviceWatcher,
             SIGNAL(serviceOwnerChanged(QString, QString, QString)), this,
             SLOT(imChanged(QString, QString, QString)));
@@ -145,6 +145,8 @@ void FcitxWatcher::unwatch() {
     disconnect(m_serviceWatcher,
                SIGNAL(serviceOwnerChanged(QString, QString, QString)), this,
                SLOT(imChanged(QString, QString, QString)));
+    delete m_serviceWatcher;
+    m_serviceWatcher = nullptr;
     unwatchSocketFile();
     cleanUpConnection();
     m_mainPresent = false;
@@ -243,6 +245,7 @@ void FcitxWatcher::watchSocketFile() {
         QDir rt(QDir::root());
         rt.mkpath(info.path());
     }
+    m_fsWatcher = new QFileSystemWatcher(this);
     m_fsWatcher->addPath(info.path());
     if (info.exists()) {
         m_fsWatcher->addPath(info.filePath());
@@ -255,14 +258,8 @@ void FcitxWatcher::watchSocketFile() {
 }
 
 void FcitxWatcher::unwatchSocketFile() {
-    if (!m_fsWatcher->files().isEmpty()) {
-        m_fsWatcher->removePaths(m_fsWatcher->files());
-    }
-    if (!m_fsWatcher->directories().isEmpty()) {
-        m_fsWatcher->removePaths(m_fsWatcher->directories());
-    }
-    m_fsWatcher->disconnect(SIGNAL(fileChanged(QString)));
-    m_fsWatcher->disconnect(SIGNAL(directoryChanged(QString)));
+    delete m_fsWatcher;
+    m_fsWatcher = nullptr;
 }
 
 void FcitxWatcher::imChanged(const QString &service, const QString &,
diff --git a/qt5/platforminputcontext/fcitxwatcher.h b/qt5/platforminputcontext/fcitxwatcher.h
index 3072b9d..f40fc64 100644
--- a/qt5/platforminputcontext/fcitxwatcher.h
+++ b/qt5/platforminputcontext/fcitxwatcher.h
@@ -63,8 +63,8 @@ private Q_SLOTS:
     void setAvailability(bool availability);
     void updateAvailability();
 
-    QFileSystemWatcher *m_fsWatcher;
-    QDBusServiceWatcher *m_serviceWatcher;
+    QFileSystemWatcher *m_fsWatcher = nullptr;
+    QDBusServiceWatcher *m_serviceWatcher = nullptr;
     QDBusConnection *m_connection;
     QDBusConnection m_sessionBus;
     QString m_socketFile;
diff --git a/qt5/platforminputcontext/qfcitxplatforminputcontext.cpp b/qt5/platforminputcontext/qfcitxplatforminputcontext.cpp
index 2d6a01d..3cf2fa8 100644
--- a/qt5/platforminputcontext/qfcitxplatforminputcontext.cpp
+++ b/qt5/platforminputcontext/qfcitxplatforminputcontext.cpp
@@ -26,6 +26,7 @@
 #include <QPalette>
 #include <QTextCharFormat>
 #include <QWindow>
+#include <qnamespace.h>
 #include <qpa/qplatformcursor.h>
 #include <qpa/qplatformscreen.h>
 #include <qpa/qwindowsysteminterface.h>
@@ -99,7 +100,8 @@ QFcitxPlatformInputContext::QFcitxPlatformInputContext()
                             ? xkb_compose_state_new(m_xkbComposeTable.data(),
                                                     XKB_COMPOSE_STATE_NO_FLAGS)
                             : 0) {
-    m_watcher->watch();
+    QMetaObject::invokeMethod(
+        this, [this]() { m_watcher->watch(); }, Qt::QueuedConnection);
 }
 
 QFcitxPlatformInputContext::~QFcitxPlatformInputContext() {