diff --git a/demo/viewer/mainwindow.cpp b/demo/viewer/mainwindow.cpp
index 34f8e9288..2b211bca9 100644
--- a/demo/viewer/mainwindow.cpp
+++ b/demo/viewer/mainwindow.cpp
@@ -387,7 +387,7 @@ void MainWindow::createToolBars()
 
     scale_factor_ = new QDoubleSpinBox(fileToolBar);
     scale_factor_->setMinimum(0.1);
-    scale_factor_->setMaximum(5.0);
+    scale_factor_->setMaximum(10.0);
     scale_factor_->setSingleStep(0.1);
     scale_factor_->setValue(1.0);