diff --git a/visualpic/ui/render_settings_dialog.py b/visualpic/ui/render_settings_dialog.py
index d721dc4..6c99b7c 100644
--- a/visualpic/ui/render_settings_dialog.py
+++ b/visualpic/ui/render_settings_dialog.py
@@ -36,7 +36,7 @@ def setup_interface(self):
         self.brightness_label.setText('{:0.2f}'.format(current_brightness))
         self.brightness_slider = QtWidgets.QSlider(Qt.Horizontal)
         self.brightness_slider.setRange(-100, 100)
-        self.brightness_slider.setValue(current_brightness*100)
+        self.brightness_slider.setValue(int(current_brightness*100))
         self.hl_1.addWidget(self.brightness_label)
         self.hl_1.addWidget(self.brightness_slider)
         self.vl.addLayout(self.hl_1)
@@ -51,7 +51,7 @@ def setup_interface(self):
         self.contrast_label.setText('{:0.2f}'.format(current_contrast))
         self.contrast_slider = QtWidgets.QSlider(Qt.Horizontal)
         self.contrast_slider.setRange(-100, 100)
-        self.contrast_slider.setValue(current_contrast*100)
+        self.contrast_slider.setValue(int(current_contrast*100))
         self.hl_2.addWidget(self.contrast_label)
         self.hl_2.addWidget(self.contrast_slider)
         self.vl.addLayout(self.hl_2)