diff --git a/Evolve.pro b/Evolve.pro
index 9ed32f1..19ac8d6 100644
--- a/Evolve.pro
+++ b/Evolve.pro
@@ -34,8 +34,6 @@ FORMS    += widget.ui \
     progressdialog.ui \
     settingswidget.ui
 
-CONFIG += c++11
-
-QMAKE_CXXFLAGS_RELEASE += -O3 -flto -march=native -mmmx # Crashes on some computers
-QMAKE_CXXFLAGS_DEBUG += -Og -g -march=native -mmmx # Crashes on some computers
+QMAKE_CXXFLAGS_RELEASE += -std=c++11 -O3 -flto -march=native -mmmx # Crashes on some computers
+QMAKE_CXXFLAGS_DEBUG += -std=c++11 -Og -g -march=native -mmmx # Crashes on some computers
 #QMAKE_CXXFLAGS_DEBUG += -Og
diff --git a/mutation.cpp b/mutation.cpp
index 5579baa..c222ebe 100644
--- a/mutation.cpp
+++ b/mutation.cpp
@@ -66,7 +66,7 @@ void Widget::reorderPoly(QVector<Poly>& newPolys, QImage &target)
             break;
     }
     int dest = qrand()%newPolys.size();
-    Poly poly = newPolys.takeAt(source);
+    Poly poly = newPolys.at(source);
     newPolys.insert(dest, poly);
     redraw(target, newPolys);
     optimizeShape(dest, newPolys);
diff --git a/widget.cpp b/widget.cpp
index 1106e4c..c324693 100644
--- a/widget.cpp
+++ b/widget.cpp
@@ -9,7 +9,8 @@
 #include <QPen>
 #include <QPainter>
 #include <QRgb>
-#include <QtConcurrent/QtConcurrent>
+#include <QtConcurrentRun>
+#include <QTimer>
 #include <ctime>
 
 //#define TIME_FITNESS