diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
index 25f971c..380ca84 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/shared/DatasetMetadataBean.java
@@ -31,7 +31,7 @@ public class DatasetMetadataBean implements Serializable {
 	private String title;
 	private String description;
 	private Map<String, String> customFields;
-	List<String> tags; // on retrieve, they are the keys of the custom fields
+	private List<String> tags; // on retrieve, they are the keys of the custom fields
 	private String license; // chosen by the user
 	private boolean visibility; // Private (false) or Public(true)
 	private String source; // url of the folder in the workspace