diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..a38e54c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "singleapplication"]
+	path = singleapplication
+	url = git@github.com:itay-grudev/SingleApplication.git
diff --git a/GPClient/GPClient b/GPClient/GPClient
index fafb981..c2ab6d4 100755
Binary files a/GPClient/GPClient and b/GPClient/GPClient differ
diff --git a/GPClient/GPClient.pro b/GPClient/GPClient.pro
index 7dbb124..7bca10b 100644
--- a/GPClient/GPClient.pro
+++ b/GPClient/GPClient.pro
@@ -4,6 +4,9 @@ greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
 CONFIG += c++11
 
+include(../singleapplication/singleapplication.pri)
+DEFINES += QAPPLICATION_CLASS=QApplication
+
 # The following define makes your compiler emit warnings if you use
 # any Qt feature that has been marked deprecated (the exact warnings
 # depend on your compiler). Please consult the documentation of the
diff --git a/GPClient/main.cpp b/GPClient/main.cpp
index 65d45bb..0d66edf 100644
--- a/GPClient/main.cpp
+++ b/GPClient/main.cpp
@@ -1,11 +1,13 @@
+#include "singleapplication.h"
 #include "gpclient.h"
 
-#include <QApplication>
-
 int main(int argc, char *argv[])
 {
-    QApplication a(argc, argv);
+    SingleApplication app(argc, argv);
     GPClient w;
     w.show();
-    return a.exec();
+
+    QObject::connect(&app, &SingleApplication::instanceStarted, &w, &GPClient::raise);
+
+    return app.exec();
 }
diff --git a/singleapplication b/singleapplication
new file mode 160000
index 0000000..0f6695e
--- /dev/null
+++ b/singleapplication
@@ -0,0 +1 @@
+Subproject commit 0f6695e2a9d8fdaa336e7ad941855c46c61f218a