diff --git a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVExportWizardTD.java b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVExportWizardTD.java
index 0b3059a..611f4a0 100644
--- a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVExportWizardTD.java
+++ b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/CSVExportWizardTD.java
@@ -12,9 +12,9 @@ import com.google.web.bindery.event.shared.EventBus;
  *
  */
 public class CSVExportWizardTD extends WizardWindow {
-
-	protected CSVExportSession exportSession;
-	protected String WIZARDWIDTH = "844px";
+	
+	private static final String WIZARDWIDTH = "844px";
+	private CSVExportSession exportSession;
 	
 	
 	/**