diff --git a/configure.ac b/configure.ac
index 539ee20f..128c0f30 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,7 +43,7 @@ AC_CHECK_HEADER([mxml.h], [], [AC_MSG_FAILURE([mxml.h is needed for ltr_gui comp
 AC_CHECK_LIB([crypto], [SHA1], [LIBCRYPTO=true], [AC_MSG_FAILURE([libcrypto not found!])])
 
 # Qt is needed for the GUI
-AC_PATH_PROGS(QMAKE_PATH, [qmake qmake-qt4])
+AC_PATH_PROGS(QMAKE_PATH, [qmake qmake-qt5 qmake5])
 
 
 # used to decompress the TrackIR firmware, if necessary
@@ -213,7 +213,7 @@ AS_IF([case $host_os in darwin*) true;; *) false;; esac],
   ]
 )
 
-m4_ifdef([PKG_CHECK_MODULES], [PKG_CHECK_MODULES([OPENCV], [opencv >= 2.0], [], [AC_MSG_RESULT([Opencl not present.])])])
+m4_ifdef([PKG_CHECK_MODULES], [PKG_CHECK_MODULES([OPENCV], [opencv4 >= 2.0], [], [AC_MSG_RESULT([Opencl not present.])])])
 
 
 AC_SUBST([OPENCV_CFLAGS])
diff --git a/src/facetrack.cpp b/src/facetrack.cpp
index 791f9d4e..06731a71 100644
--- a/src/facetrack.cpp
+++ b/src/facetrack.cpp
@@ -3,6 +3,7 @@
 #include "facetrack.h"
 #include "wc_driver_prefs.h"
 
+#include <opencv2/core/core_c.h>
 #include <opencv2/core/core.hpp>
 #include <opencv2/objdetect/objdetect.hpp>
 #include <opencv2/imgproc/imgproc.hpp>
diff --git a/src/game_data.c b/src/game_data.c
index 74bb00aa..ff170171 100644
--- a/src/game_data.c
+++ b/src/game_data.c
@@ -139,7 +139,9 @@ bool get_game_data(const char *input_fname, const char *output_fname, bool from_
     if(appid == NULL){
       fprintf(outfile, "%s \"%s\"\n", id, name);
     }else{
-      fprintf(outfile, "%s \"%s\" (%s)\n", id, name, appid->child->value.text.string);
+      mxml_node_t *child = mxmlGetFirstChild(appid);
+      int whitespace;
+      fprintf(outfile, "%s \"%s\" (%s)\n", id, name, mxmlGetText(child, &whitespace));
     }
   }
   fclose(outfile);
diff --git a/src/mickey/my_line_edit.cpp b/src/mickey/my_line_edit.cpp
index 862a331f..8c075e50 100644
--- a/src/mickey/my_line_edit.cpp
+++ b/src/mickey/my_line_edit.cpp
@@ -9,7 +9,7 @@ myLineEdit::myLineEdit(QWidget *parent) : QLineEdit(parent), tgt(NULL)
 
 void myLineEdit::keyPressEvent(QKeyEvent * event)
 {
-  QString seq = QString::null;
+  QString seq = QString();
   Qt::KeyboardModifiers mods = event->modifiers();
   if(mods & Qt::ShiftModifier){
     seq += QString::fromUtf8("Shift+");
diff --git a/src/qt_gui/glwidget.cpp b/src/qt_gui/glwidget.cpp
index 5e80b6bb..9856484b 100644
--- a/src/qt_gui/glwidget.cpp
+++ b/src/qt_gui/glwidget.cpp
@@ -2,7 +2,7 @@
   #include "../../config.h"
 #endif
 
-#include <QtGui>
+#include <QtWidgets>
 #include <QtOpenGL>
 #ifndef DARWIN
 #include <GL/glu.h>
diff --git a/src/qt_gui/precomp_headers.h b/src/qt_gui/precomp_headers.h
index 1b875921..25cc9766 100644
--- a/src/qt_gui/precomp_headers.h
+++ b/src/qt_gui/precomp_headers.h
@@ -57,7 +57,7 @@
 #include <QTemporaryFile>
 #include <QTextBrowser>
 #include <QTextStream>
-#include <QtGui>
+#include <QtWidgets>
 #include <QAction>
 #include <QApplication>
 #include <QButtonGroup>
diff --git a/src/qt_gui/window.cpp b/src/qt_gui/window.cpp
index 485045f0..e0e2114a 100644
--- a/src/qt_gui/window.cpp
+++ b/src/qt_gui/window.cpp
@@ -1,4 +1,4 @@
-#include <QtGui>
+#include <QtWidgets>
 #include <QTabWidget>
 
  #include "glwidget.h"