diff -Nru a/quimup.pro b/quimup.pro
--- a/quimup.pro	2015-11-01 10:47:46.000000000 +0100
+++ b/quimup.pro	2016-05-17 16:25:18.309963711 +0200
@@ -22,6 +22,9 @@
 PKGCONFIG = libmpdclient
 PKGCONFIG += taglib
 
+#use system qtsingleapplication
+CONFIG += qtsingleapplication
+
 BUILD_PATH = ./build
 
 CONFIG(debug, debug|release) {
@@ -61,10 +64,7 @@
     src/qm_itemlist.cpp \
     src/qm_songinfo.cpp \
     src/qm_streamloader.cpp \
-    src/qm_colorpicker.cpp \
-    src/qtlocalpeer.cpp \
-    src/qtsingleapplication.cpp \
-    src/qtlockedfile.cpp
+    src/qm_colorpicker.cpp
 
 HEADERS += src/qm_clicklabel.h \
     src/qm_clickprogressbar.h \
@@ -84,10 +84,7 @@
     src/qm_itemlist.h \
     src/qm_browser_ids.h \
     src/qm_streamloader.h \
-    src/qm_colorpicker.h \
-    src/qtlocalpeer.h \
-    src/qtsingleapplication.h \
-    src/qtlockedfile.h
+    src/qm_colorpicker.h
 
 RESOURCES += src/quimup.qrc
 
diff -Nru a/src/main.cpp b/src/main.cpp
--- a/src/main.cpp	2016-02-28 10:52:29.000000000 +0100
+++ b/src/main.cpp	2016-05-17 16:20:19.660415158 +0200
@@ -24,7 +24,7 @@
 #include <QLocale>
 #include <QTextCodec>
 #include <QDir>
-#include "qtsingleapplication.h"
+#include <QtSolutions/qtsingleapplication.h>
 #include "qm_core.h"