diff --git a/pom.xml b/pom.xml
index 9190725..79ffe7c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>6.1.0</version>
+		<version>7.1.0</version>
 		<relativePath />
 	</parent>
 
diff --git a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
index 914e18c..f95cfaa 100644
--- a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
+++ b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
@@ -52,10 +52,10 @@
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
 
+import org.scijava.module.ModuleService;
 import org.scijava.plugin.Parameter;
 import org.scijava.plugin.Plugin;
 import org.scijava.thread.ThreadService;
-import org.scijava.util.NumberUtils;
 import org.scijava.widget.InputWidget;
 import org.scijava.widget.NumberWidget;
 import org.scijava.widget.WidgetModel;
@@ -73,6 +73,9 @@ public class SwingNumberWidget extends SwingInputWidget<Number> implements
 	@Parameter
 	private ThreadService threadService;
 
+	@Parameter
+	private ModuleService moduleService;
+
 	private JScrollBar scrollBar;
 	private JSlider slider;
 	private JSpinner spinner;
@@ -123,8 +126,14 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
 		// add spinner widget
 		final Class<?> type = model.getItem().getType();
 		if (model.getValue() == null) {
-			final Number defaultValue = NumberUtils.getDefaultValue(min, max, type);
-			model.setValue(defaultValue);
+			final Object defaultValue =
+				moduleService.getDefaultValue(model.getItem());
+			if (!(defaultValue instanceof Number)) {
+				throw new IllegalStateException("Invalid default value type: " +
+					defaultValue.getClass().getName());
+			}
+			final Number defaultNumber = (Number) defaultValue;
+			model.setValue(defaultNumber);
 		}
 		final Number value = (Number) model.getValue();
 		final SpinnerNumberModel spinnerModel =