diff --git a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/grid/ColumnDataGridPanel.java b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/grid/ColumnDataGridPanel.java
index ea048cd..65e5055 100644
--- a/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/grid/ColumnDataGridPanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/csvexportwidget/client/grid/ColumnDataGridPanel.java
@@ -42,11 +42,11 @@ public class ColumnDataGridPanel extends ContentPanel implements
 		HasSelectionHandlers<ColumnData> {
 	//private static final String GRID_WIDTH  ="524px";
 	private static final String GRID_HEIGHT = "280px";
-	protected static final ColumnDataProperties props = GWT
+	private static final ColumnDataProperties props = GWT
 			.create(ColumnDataProperties.class);
-	protected final CheckBoxSelectionModel<ColumnData> sm;
+	private final CheckBoxSelectionModel<ColumnData> sm;
 
-	protected final Grid<ColumnData> grid;
+	private final Grid<ColumnData> grid;
 	private WizardCard parent;