diff --git a/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java b/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
index 1b9f621..d46fc07 100644
--- a/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
@@ -318,8 +318,9 @@ public class JoinServiceImpl extends RemoteServiceServlet implements JoinService
 			String vreName = selectedVRE.getGroupName();
 			String vreDescription = selectedVRE.getDescription();
 
+			long nowInMillis = new Date().getTime();
 			long logoId = selectedVRE.getLogoId();
-			String vreLogoURL = "/image/layout_set_logo?img_id="+ logoId;
+			String vreLogoURL = "/image/layout_set_logo?img_id="+ logoId+"&t="+nowInMillis;;
 			String infraScope = gm.getInfrastructureScope(selectedVRE.getGroupId());
 			String friendlyURL =  GCubePortalConstants.PREFIX_GROUP_URL+selectedVRE.getFriendlyURL();
 			VRECustomAttributes attrs = getVRECustomAttr(selectedVRE);