diff --git a/Applications/DataExplorer/DataView/DiagramView/DetailWindow.h b/Applications/DataExplorer/DataView/DiagramView/DetailWindow.h
index e4a0f209a9ffd14fe1f81515886d4f54a821fb54..b473773748858d1e4a24f986b90ae276f9010edc 100644
--- a/Applications/DataExplorer/DataView/DiagramView/DetailWindow.h
+++ b/Applications/DataExplorer/DataView/DiagramView/DetailWindow.h
@@ -16,7 +16,8 @@
 #define DETAILWINDOW_H
 
 #include "ui_DetailWindow.h"
-#include <QtGui/QWidget>
+#include <QWidget>
+
 
 /**
  * \brief Creates a window containing a diagram.
diff --git a/Applications/DataExplorer/DataView/DiagramView/DiagramPrefsDialog.h b/Applications/DataExplorer/DataView/DiagramView/DiagramPrefsDialog.h
index 7f15039f78bf9618179ec50c4e149c2e36db2d8a..cc8c4804fab25cd6423cee3e57383bea941da5ae 100644
--- a/Applications/DataExplorer/DataView/DiagramView/DiagramPrefsDialog.h
+++ b/Applications/DataExplorer/DataView/DiagramView/DiagramPrefsDialog.h
@@ -16,7 +16,8 @@
 #define DIAGRAMPREFSDIALOG_H
 
 #include "ui_DiagramPrefs.h"
-#include <QtGui/QMainWindow>
+#include <QMainWindow>
+
 
 class DetailWindow;
 class DiagramList;
diff --git a/Applications/DataExplorer/DataView/DiagramView/DiagramView.h b/Applications/DataExplorer/DataView/DiagramView/DiagramView.h
index 6cd385ca78cd8de039cc01bbcafca76c33ab2bf5..7b3412b1af4a571a333d2a9eae0354fd95adba76 100644
--- a/Applications/DataExplorer/DataView/DiagramView/DiagramView.h
+++ b/Applications/DataExplorer/DataView/DiagramView/DiagramView.h
@@ -17,7 +17,8 @@
 
 #include "DiagramScene.h"
 #include <QGraphicsView>
-#include <QtGui/QWidget>
+#include <QWidget>
+
 
 /**
  * \brief A view in which to display a DiagramScene.
diff --git a/Applications/DataExplorer/DataView/StratView/StratView.h b/Applications/DataExplorer/DataView/StratView/StratView.h
index f54d5f01bfc41578d59868978b29cc21bc18d7f1..88771d54b1a7ff5649e0eaa9588a3378456fc083 100644
--- a/Applications/DataExplorer/DataView/StratView/StratView.h
+++ b/Applications/DataExplorer/DataView/StratView/StratView.h
@@ -17,7 +17,8 @@
 
 #include "StratScene.h"
 #include <QGraphicsView>
-#include <QtGui/QWidget>
+#include <QWidget>
+
 
 namespace GeoLib
 {
diff --git a/Applications/DataExplorer/main.cpp b/Applications/DataExplorer/main.cpp
index 8e71f5aaed16b22408f008f7973aaf59bcc2fe9c..6c0d9aa1112950596fa124eabfa8ed3a1e12f82d 100644
--- a/Applications/DataExplorer/main.cpp
+++ b/Applications/DataExplorer/main.cpp
@@ -1,7 +1,8 @@
 #include "mainwindow.h"
 
 #include <memory>
-#include <QtGui/QApplication>
+#include <QApplication>
+
 #include <logog/include/logog.hpp>
 #include "LogogSimpleFormatter.h"
 #ifdef VTKFBXCONVERTER_FOUND
diff --git a/Applications/Utils/OGSFileConverter/main.cpp b/Applications/Utils/OGSFileConverter/main.cpp
index f04d37c7abc9e8702066677bf3d827225d815a18..5a19d03f3835752f998bc647f7fcf593e3292084 100644
--- a/Applications/Utils/OGSFileConverter/main.cpp
+++ b/Applications/Utils/OGSFileConverter/main.cpp
@@ -13,7 +13,8 @@
 
 #include "Applications/ApplicationsLib/LogogSetup.h"
 
-#include <QtGui/QApplication>
+#include <QApplication>
+
 
 int main(int argc, char* argv[])
 {