diff --git a/pom.xml b/pom.xml
index 5f54f75..cbf1af0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>28.0.0</version>
+		<version>30.0.0-SNAPSHOT</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 e833419..ce710cd 100644
--- a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
+++ b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
@@ -119,6 +119,7 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
 		final SpinnerNumberModel spinnerModel =
 			new SpinnerNumberModelFactory().createModel(value, min, max, stepSize);
 		spinner = new JSpinner(spinnerModel);
+		spinner.setEditor(new JSpinner.NumberEditor(spinner, model.getFormat()));
 		Dimension spinnerSize = spinner.getSize();
 		spinnerSize.width = 50;
 		spinner.setPreferredSize(spinnerSize);