diff --git a/src/main/java/com/flowingcode/vaadin/addons/orgchart/client/OrgChartState.java b/src/main/java/com/flowingcode/vaadin/addons/orgchart/client/OrgChartState.java
index c9bc216..ff2ce1f 100644
--- a/src/main/java/com/flowingcode/vaadin/addons/orgchart/client/OrgChartState.java
+++ b/src/main/java/com/flowingcode/vaadin/addons/orgchart/client/OrgChartState.java
@@ -22,10 +22,11 @@
 
 import com.flowingcode.vaadin.addons.orgchart.client.constants.ChartConstants;
 import com.flowingcode.vaadin.addons.orgchart.client.enums.ChartDirectionEnum;
+import java.io.Serializable;
 
 /** @author pbartolo */
 @SuppressWarnings("serial")
-public class OrgChartState {
+public class OrgChartState implements Serializable {
 
   public String value;