diff --git a/glue_vispy_viewers/volume/qt/volume_viewer.py b/glue_vispy_viewers/volume/qt/volume_viewer.py
index 4bafb73b..62ea79b6 100644
--- a/glue_vispy_viewers/volume/qt/volume_viewer.py
+++ b/glue_vispy_viewers/volume/qt/volume_viewer.py
@@ -64,7 +64,7 @@ def mouse_release(self, event=None):
             if hasattr(self._vispy_widget, '_multivol') and self._downsampled:
                 self._vispy_widget._multivol.upsample()
                 self._downsampled = False
-                self._vispy_widget.canvas.render()
+                self._vispy_widget.canvas.update()
 
         self._update_slice_transform()
         self._update_clip()