diff --git a/src/main/java/org/gcube/portlets/user/gcubeloggedin/server/LoggedinServiceImpl.java b/src/main/java/org/gcube/portlets/user/gcubeloggedin/server/LoggedinServiceImpl.java
index 5f4368c..9d551b2 100644
--- a/src/main/java/org/gcube/portlets/user/gcubeloggedin/server/LoggedinServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/gcubeloggedin/server/LoggedinServiceImpl.java
@@ -1,6 +1,7 @@
 package org.gcube.portlets.user.gcubeloggedin.server;
 
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -105,9 +106,9 @@ public class LoggedinServiceImpl extends RemoteServiceServlet implements Loggedi
 
 		_log.trace("CURRENT ORG SET IN SESSION: " + currSite.getGroupName());
 
-
+		long nowInMillis = new Date().getTime();
 		String name = currSite.getGroupName();
-		String logoURL =  "/image/layout_set_logo?img_id="+currSite.getLogoId();
+		String logoURL =  "/image/layout_set_logo?img_id="+currSite.getLogoId()+"&t="+nowInMillis;
 		String desc = "";
 		//set the description for the vre
 		if (currSite.getDescription() != null)