diff --git a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/SessionUtil.java b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/SessionUtil.java
index 27add46..92efcff 100644
--- a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/SessionUtil.java
+++ b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/SessionUtil.java
@@ -11,9 +11,9 @@ import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
 import org.gcube.portlets.admin.authportletmanager.shared.ConstantsSharing;
 import org.gcube.portlets.admin.authportletmanager.shared.exceptions.ExpiredSessionServiceException;
 import org.gcube.portlets.admin.authportletmanager.shared.exceptions.ServiceException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
+import com.liferay.portal.kernel.log.Log;
+import com.liferay.portal.kernel.log.LogFactoryUtil;
 
 
 /**
@@ -24,8 +24,8 @@ import org.slf4j.LoggerFactory;
  */
 public class SessionUtil {
 
-	private static Logger logger = LoggerFactory.getLogger(SessionUtil.class);
-
+	private static final Log logger = LogFactoryUtil.getLog(AuthServiceImpl.class);
+	
 	public static ASLSession getASLSession(HttpSession httpSession)
 			throws ServiceException {
 		String username = (String) httpSession
diff --git a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AccountingManagerPortlet.java b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AccountingManagerPortlet.java
index cd54034..73e93e0 100644
--- a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AccountingManagerPortlet.java
+++ b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AccountingManagerPortlet.java
@@ -12,8 +12,6 @@ import javax.portlet.RenderRequest;
 import javax.portlet.RenderResponse;
 
 import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * 
@@ -23,10 +21,7 @@ import org.slf4j.LoggerFactory;
  */
 public class AccountingManagerPortlet extends GenericPortlet {
 	
-	protected Logger logger = LoggerFactory.getLogger(AccountingManagerPortlet.class);
-
-
-	/**
+		/**
 	 * JSP folder name
 	 */
 	public static final String JSP_FOLDER = "/WEB-INF/jsp/";
diff --git a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AuthManagerPortlet.java b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AuthManagerPortlet.java
index 4c557ba..7adb6b3 100644
--- a/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AuthManagerPortlet.java
+++ b/src/main/java/org/gcube/portlets/admin/authportletmanager/server/portlet/AuthManagerPortlet.java
@@ -12,8 +12,10 @@ import javax.portlet.RenderRequest;
 import javax.portlet.RenderResponse;
 
 import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import org.gcube.portlets.admin.authportletmanager.server.AuthServiceImpl;
+
+import com.liferay.portal.kernel.log.Log;
+import com.liferay.portal.kernel.log.LogFactoryUtil;
 
 /**
  * 
@@ -22,10 +24,7 @@ import org.slf4j.LoggerFactory;
  * 
  */
 public class AuthManagerPortlet extends GenericPortlet {
-	
-	protected Logger logger = LoggerFactory.getLogger(AuthManagerPortlet.class);
-
-
+	private static final Log logger = LogFactoryUtil.getLog(AuthServiceImpl.class);
 	/**
 	 * JSP folder name
 	 */