diff --git a/pom.xml b/pom.xml
index 9a3a318..cace6af 100644
--- a/pom.xml
+++ b/pom.xml
@@ -145,7 +145,6 @@
 		<dependency>
 			<groupId>org.gcube.dvos</groupId>
 			<artifactId>usermanagement-core</artifactId>
-			<version>[1.0.0-SNAPSHOT, 2.0.0-SNAPSHOT)</version>
 			<scope>provided</scope>
 		</dependency>
 		<dependency>
diff --git a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/CKANPublisherServicesImpl.java b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/CKANPublisherServicesImpl.java
index 36a738b..46aaa92 100644
--- a/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/CKANPublisherServicesImpl.java
+++ b/src/main/java/org/gcube/portlets/widgets/ckandatapublisherwidget/server/CKANPublisherServicesImpl.java
@@ -35,8 +35,8 @@ import org.gcube.portlets.widgets.ckandatapublisherwidget.shared.MetaDataTypeWra
 import org.gcube.portlets.widgets.ckandatapublisherwidget.shared.MetadataFieldWrapper;
 import org.gcube.portlets.widgets.ckandatapublisherwidget.shared.ResourceBeanWrapper;
 import org.gcube.vomanagement.usermanagement.UserManager;
-import org.gcube.vomanagement.usermanagement.impl.liferay.LiferayUserManager;
-import org.gcube.vomanagement.usermanagement.model.UserModel;
+import org.gcube.vomanagement.usermanagement.impl.LiferayUserManager;
+import org.gcube.vomanagement.usermanagement.model.GCubeUser;
 import org.slf4j.LoggerFactory;
 
 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
@@ -271,7 +271,8 @@ public class CKANPublisherServicesImpl extends RemoteServiceServlet implements C
 						+ " whose owner is " + owner);
 				// get usermanager (liferay)
 				UserManager liferUserManager = new LiferayUserManager();
-				UserModel userOwner = liferUserManager.getUserByScreenName(owner);
+				GCubeUser userOwner = liferUserManager.getUserByUsername(owner);
+				
 
 				// build bean
 				logger.debug("Building bean");