--- diffpdf-2.1.3/diffpdf.pro
+++ diffpdf-2.1.3/diffpdf.pro
@@ -31,35 +31,41 @@ TRANSLATIONS += diffpdf_fr.ts
 TRANSLATIONS += diffpdf_de.ts
 TRANSLATIONS += diffpdf_es.ts
 CODECFORTR    = UTF-8
-LIBS	     += -lpoppler-qt4
+LIBS	     += -lpoppler-qt5 -lQt5Core -lQt5Widgets -lQt5Gui -lQt5PrintSupport
 win32 {
     CONFIG += release
 }
 exists($(HOME)/opt/poppler024/) {
     message(Using locally built Poppler library)
     INCLUDEPATH += $(HOME)/opt/poppler024/include/poppler/cpp
-    INCLUDEPATH += $(HOME)/opt/poppler024/include/poppler/qt4
+    INCLUDEPATH += $(HOME)/opt/poppler024/include/poppler/qt5
     LIBS += -Wl,-rpath -Wl,$(HOME)/opt/poppler024/lib -L$(HOME)/opt/poppler024/lib
 } else {
     exists(/poppler_lib) {
 	message(Using locally built Poppler library on Windows)
 	INCLUDEPATH += /c/poppler_lib/include/poppler/cpp
-	INCLUDEPATH += /c/poppler_lib/include/poppler/qt4
+	INCLUDEPATH += /c/poppler_lib/include/poppler/qt5
 	LIBS += -Wl,-rpath -Wl,/c/poppler_lib/bin -Wl,-L/c/poppler_lib/bin
     } else {
-	exists(/usr/include/poppler/qt4) {
+	exists(/usr/include/poppler/qt5) {
 	    INCLUDEPATH += /usr/include/poppler/cpp
-	    INCLUDEPATH += /usr/include/poppler/qt4
+	    INCLUDEPATH += /usr/include/poppler/qt5
+	    INCLUDEPATH += /usr/include/qt5/QtCore
+	    INCLUDEPATH += /usr/include/qt5/QtWidgets
+	    INCLUDEPATH += /usr/include/qt5/QtPrintSupport
 	} else {
 	    INCLUDEPATH += /usr/local/include/poppler/cpp
-	    INCLUDEPATH += /usr/local/include/poppler/qt4
+	    INCLUDEPATH += /usr/local/include/poppler/qt5
+	    INCLUDEPATH += /usr/local/include/qt5/QtCore
+	    INCLUDEPATH += /usr/local/include/qt5/QtWidgets
+	    INCLUDEPATH += /usr/local/include/qt5/QtPrintSupport
 	}
     }
 }
 #exists($(HOME)/opt/podofo09/) {
 #    message(Using locally built PoDoFo library)
 #    INCLUDEPATH += $(HOME)/opt/podofo09/include/poppler/cpp
-#    INCLUDEPATH += $(HOME)/opt/podofo09/include/poppler/qt4
+#    INCLUDEPATH += $(HOME)/opt/podofo09/include/poppler/qt5
 #    LIBS += -Wl,-rpath -Wl,$(HOME)/opt/podofo09/lib64 -Wl,-L$(HOME)/opt/podofo09/lib64
 #} else {
 #    exists(/usr/include/podofo) {
--- diffpdf-2.1.3/generic.hpp
+++ diffpdf-2.1.3/generic.hpp
@@ -12,7 +12,7 @@
     for more details.
 */
 
-#include <poppler-qt4.h>
+#include <poppler-qt5.h>
 #include <QMetaType>
 #include <QPair>
 #include <QPixmap>
--- diffpdf-2.1.3/label.cpp
+++ diffpdf-2.1.3/label.cpp
@@ -15,6 +15,7 @@
 #include <QDragEnterEvent>
 #include <QDragEnterEvent>
 #include <QMouseEvent>
+#include <QMimeData>
 
 Label::Label(QWidget *parent) : QLabel(parent)
 {
--- diffpdf-2.1.3/lineedit.cpp
+++ diffpdf-2.1.3/lineedit.cpp
@@ -14,6 +14,7 @@
 #include "lineedit.hpp"
 #include <QDragEnterEvent>
 #include <QDragEnterEvent>
+#include <QMimeData>
 
 
 LineEdit::LineEdit(QWidget *parent) : QLineEdit(parent)
--- diffpdf-2.1.3/main.cpp
+++ diffpdf-2.1.3/main.cpp
@@ -31,7 +31,6 @@ int main(int argc, char *argv[])
     app.setOrganizationDomain("qtrac.eu");
     app.setApplicationName("DiffPDF");
     app.setWindowIcon(QIcon(":/icon.png"));
-    QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
 
     QTextStream out(stdout);
     QStringList args = app.arguments().mid(1);
--- diffpdf-2.1.3/mainwindow.hpp
+++ diffpdf-2.1.3/mainwindow.hpp
@@ -19,7 +19,7 @@
 #else
 #include <tr1/memory>
 #endif
-#include <poppler-qt4.h>
+#include <poppler-qt5.h>
 #include <QBrush>
 #include <QList>
 #include <QMainWindow>
--- diffpdf-2.1.3/optionsform.cpp
+++ diffpdf-2.1.3/optionsform.cpp
@@ -76,9 +76,9 @@ void OptionsForm::createWidgets()
             << qMakePair(tr("Diagonal \\"), Qt::FDiagPattern)
             << qMakePair(tr("Diagonal Cross"), Qt::DiagCrossPattern))
         brushStyleComboBox->addItem(brushSwatch(pair.second, color),
-                                                pair.first, pair.second);
+                                                pair.first, static_cast<int>(pair.second));
     brushStyleComboBox->setCurrentIndex(brushStyleComboBox->findData(
-                brush.style()));
+                static_cast<int>(brush.style())));
 
     penStyleComboBox = new QComboBox;
     typedef QPair<QString, Qt::PenStyle> PenPair;
@@ -90,9 +90,9 @@ void OptionsForm::createWidgets()
             << qMakePair(tr("Dash-Dotted"), Qt::DashDotLine)
             << qMakePair(tr("Dash-Dot-Dotted"), Qt::DashDotDotLine))
         penStyleComboBox->addItem(penStyleSwatch(pair.second, color),
-                                  pair.first, pair.second);
+                                  pair.first, static_cast<int>(pair.second));
     penStyleComboBox->setCurrentIndex(penStyleComboBox->findData(
-                pen.style()));
+                static_cast<int>(pen.style())));
 
     alphaSpinBox = new QSpinBox;
     alphaSpinBox->setRange(1, 100);