diff --git a/src/m64py/frontend/mainwindow.py b/src/m64py/frontend/mainwindow.py
index f845bbc..7c59ff4 100644
--- a/src/m64py/frontend/mainwindow.py
+++ b/src/m64py/frontend/mainwindow.py
@@ -177,7 +177,7 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         width, height = size.width(), size.height()
         dwidth, dheight = desktop.width(), desktop.height()
         cw, ch = (dwidth/2)-(width/2), (dheight/2)-(height/2)
-        self.move(cw, ch)
+        self.move(int(cw), int(ch))
 
     def connect_signals(self):
         """Connects signals."""
diff --git a/src/m64py/frontend/romreader.py b/src/m64py/frontend/romreader.py
index ff861d0..84de37a 100644
--- a/src/m64py/frontend/romreader.py
+++ b/src/m64py/frontend/romreader.py
@@ -123,7 +123,7 @@ class ROMReader(QThread):
                 log.warn(str(err))
                 continue
             percent = float(filenum) / float(num_files) * 100
-            self.parent.progressBar.valueChanged.emit(percent)
+            self.parent.progressBar.valueChanged.emit(int(percent))
         self.exit()
 
     def stop(self):