diff --git a/sloth/gui/frameviewer.py b/sloth/gui/frameviewer.py
index ca552af..b3904ca 100644
--- a/sloth/gui/frameviewer.py
+++ b/sloth/gui/frameviewer.py
@@ -17,9 +17,7 @@ class GraphicsView(QGraphicsView):
     def __init__(self, parent=None):
         QGraphicsView.__init__(self, parent)
         #self.setDragMode(QGraphicsView.ScrollHandDrag)
-        self.setRenderHint(QPainter.Antialiasing)
-        self.setRenderHint(QPainter.TextAntialiasing)
-
+        self.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform | QPainter.TextAntialiasing);
         self.setStyleSheet("QFrame { border: 3px solid black }");
         self.active_ = False