--- src/gui/application.h~	2019-03-18 04:08:22.000000000 -0500
+++ src/gui/application.h	2019-06-12 15:33:55.941943652 -0500
@@ -22,7 +22,7 @@
 #include <QElapsedTimer>
 #include <QNetworkConfigurationManager>
 
-#include "qtsingleapplication.h"
+#include <QtSolutions/qtsingleapplication.h>
 
 #include "syncresult.h"
 #include "logbrowser.h"
--- src/3rdparty/qtsingleapplication/qtlocalpeer.h~	2019-03-18 04:08:22.000000000 -0500
+++ src/3rdparty/qtsingleapplication/qtlocalpeer.h	2019-06-12 16:15:19.083450495 -0500
@@ -27,7 +27,7 @@
 **
 ****************************************************************************/
 
-#include <qtlockedfile.h>
+#include <QTSolutions/qtlockedfile.h>
 
 #include <QLocalServer>
 #include <QLocalSocket>
--- src/gui/application.cpp~	2019-03-18 04:08:22.000000000 -0500
+++ src/gui/application.cpp	2019-06-12 16:16:39.396142159 -0500
@@ -157,7 +157,7 @@
 }
 
 Application::Application(int &argc, char **argv)
-    : SharedTools::QtSingleApplication(Theme::instance()->appName(), argc, argv)
+    : QtSingleApplication(Theme::instance()->appName(), argc, argv)
     , _gui(0)
     , _theme(Theme::instance())
     , _helpOnly(false)
--- src/gui/application.cpp~	2019-06-12 16:16:39.000000000 -0500
+++ src/gui/application.cpp	2019-06-12 16:17:37.579918781 -0500
@@ -254,7 +254,7 @@
 
     _folderManager.reset(new FolderMan);
 
-    connect(this, &SharedTools::QtSingleApplication::messageReceived, this, &Application::slotParseMessage);
+    connect(this, &QtSingleApplication::messageReceived, this, &Application::slotParseMessage);
 
     if (!AccountManager::instance()->restore()) {
         // If there is an error reading the account settings, try again
--- src/gui/application.cpp~	2019-06-12 16:17:37.000000000 -0500
+++ src/gui/application.cpp	2019-06-12 16:19:07.878572107 -0500
@@ -487,7 +487,7 @@
     _gui->slotComputeOverallSyncStatus();
 }
 
-void Application::slotParseMessage(const QString &msg, QObject *)
+void Application::slotParseMessage(const QString &msg)
 {
     if (msg.startsWith(QLatin1String("MSG_PARSEOPTIONS:"))) {
         const int lengthOfMsgPrefix = 17;
--- src/gui/application.h~	2019-03-18 04:08:22.000000000 -0500
+++ src/gui/application.h	2019-06-12 16:20:21.895287942 -0500
@@ -52,7 +52,7 @@
  * @brief The Application class
  * @ingroup gui
  */
-class Application : public SharedTools::QtSingleApplication
+class Application : public QtSingleApplication
 {
     Q_OBJECT
 public:
@@ -94,7 +94,7 @@
     void folderStateChanged(Folder *);
 
 protected slots:
-    void slotParseMessage(const QString &, QObject *);
+    void slotParseMessage(const QString &);
     void slotCheckConnection();
     void slotUseMonoIconsChanged(bool);
     void slotCleanup();
--- src/gui/CMakeLists.txt~	2019-03-18 04:08:22.000000000 -0500
+++ src/gui/CMakeLists.txt	2019-06-12 16:21:29.097029941 -0500
@@ -285,6 +285,8 @@
 target_link_libraries( ${APPLICATION_EXECUTABLE} Qt5::Widgets Qt5::Network Qt5::Xml)
 target_link_libraries( ${APPLICATION_EXECUTABLE} ${synclib_NAME} )
 target_link_libraries( ${APPLICATION_EXECUTABLE} updater )
+target_link_libraries( ${APPLICATION_EXECUTABLE} Qt5Solutions_LockedFile-2.4 )
+target_link_libraries( ${APPLICATION_EXECUTABLE} Qt5Solutions_SingleApplication-2.6 )
 target_link_libraries( ${APPLICATION_EXECUTABLE} ${OS_SPECIFIC_LINK_LIBRARIES} )
 
 target_include_directories(${APPLICATION_EXECUTABLE} PRIVATE
--- src/gui/application.cpp~	2019-06-12 16:21:48.000000000 -0500
+++ src/gui/application.cpp	2019-06-12 16:24:35.505314285 -0500
@@ -759,7 +759,7 @@
         QTimer::singleShot(0, this, [this, fn] { openVirtualFile(fn); });
     }
 #endif
-    return SharedTools::QtSingleApplication::event(event);
+    return QtSingleApplication::event(event);
 }
 
 } // namespace OCC
--- src/gui/CMakeLists.txt~	2019-11-20 18:11:30.000000000 -0600
+++ src/gui/CMakeLists.txt	2019-11-20 18:15:32.367903089 -0600
@@ -150,18 +150,8 @@
 
 set(3rdparty_SRC
     ../3rdparty/QProgressIndicator/QProgressIndicator.cpp
-    ../3rdparty/qtlockedfile/qtlockedfile.cpp
-    ../3rdparty/qtsingleapplication/qtlocalpeer.cpp
-    ../3rdparty/qtsingleapplication/qtsingleapplication.cpp
-    ../3rdparty/qtsingleapplication/qtsinglecoreapplication.cpp
    )
 
-if(NOT WIN32)
-   list(APPEND 3rdparty_SRC ../3rdparty/qtlockedfile/qtlockedfile_unix.cpp)
-else()
-   list(APPEND 3rdparty_SRC ../3rdparty/qtlockedfile/qtlockedfile_win.cpp )
-endif()
-
 
 find_package(Qt5LinguistTools)
 if(Qt5LinguistTools_FOUND)