diff --git a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/parameters/TimeParameter.java b/src/main/java/org/gcube/portlets/user/dataminermanager/shared/parameters/TimeParameter.java
index 7ef75a7..fa82be7 100644
--- a/src/main/java/org/gcube/portlets/user/dataminermanager/shared/parameters/TimeParameter.java
+++ b/src/main/java/org/gcube/portlets/user/dataminermanager/shared/parameters/TimeParameter.java
@@ -3,7 +3,6 @@
  */
 package org.gcube.portlets.user.dataminermanager.shared.parameters;
 
-import com.google.gwt.user.client.rpc.IsSerializable;
 
 /**
  * 
@@ -11,7 +10,7 @@ import com.google.gwt.user.client.rpc.IsSerializable;
  *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
  *
  */
-public class TimeParameter extends Parameter implements IsSerializable {
+public class TimeParameter extends Parameter {
 
 	private static final long serialVersionUID = 1673874854501249519L;
 	private String defaultValue;