diff --git a/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java b/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
index ee57685..a6087e3 100644
--- a/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/newsfeed/server/NewsServiceImpl.java
@@ -55,6 +55,7 @@ import org.gcube.portlets.user.newsfeed.shared.UserSettings;
 import org.gcube.portlets.widgets.pickitem.shared.ItemBean;
 import org.gcube.social_networking.socialutillibrary.Utils;
 import org.gcube.socialnetworking.social_data_search_client.ElasticSearchClientImpl;
+import org.gcube.socialnetworking.social_data_search_client.ElasticSearchClientInterface;
 import org.gcube.vomanagement.usermanagement.GroupManager;
 import org.gcube.vomanagement.usermanagement.UserManager;
 import org.gcube.vomanagement.usermanagement.exception.TeamRetrievalFault;
@@ -100,7 +101,7 @@ public class NewsServiceImpl extends RemoteServiceServlet implements NewsService
 	/**
 	 * Elasticsearch client
 	 */
-	private ElasticSearchClientImpl el;
+	private ElasticSearchClientInterface el;
 
 	private final static int MAX_FEEDS_NO = 45;