diff --git a/src/main/java/org/gcube/gcat/client/Configuration.java b/src/main/java/org/gcube/gcat/client/Configuration.java
index f2244a5..1dc686d 100644
--- a/src/main/java/org/gcube/gcat/client/Configuration.java
+++ b/src/main/java/org/gcube/gcat/client/Configuration.java
@@ -5,37 +5,58 @@ import java.net.URL;
 
 import javax.xml.ws.WebServiceException;
 
+import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
+import org.gcube.gcat.api.configuration.CatalogueConfiguration;
+
 /**
  * @author Luca Frosini (ISTI - CNR)
  */
-public class Configuration extends GCatClient implements org.gcube.gcat.api.interfaces.Configuration<String,Void> {
+public class Configuration extends GCatClient implements org.gcube.gcat.api.interfaces.Configuration<CatalogueConfiguration,Void> {
+	
+	protected ObjectMapper mapper;
 	
 	public Configuration() throws MalformedURLException {
 		super(CONFIGURATION);
+		mapper = new ObjectMapper();
 	}
 	
 	public Configuration(URL enforcedServiceURL) throws MalformedURLException {
 		super(enforcedServiceURL, CONFIGURATION);
+		mapper = new ObjectMapper();
+	}
+
+	protected CatalogueConfiguration getCatalogueConfigurationFromString(String json) throws WebServiceException {
+		try {
+			return mapper.readValue(json, CatalogueConfiguration.class);
+		} catch (WebServiceException e) {
+			throw e;
+		} catch (Exception e) {
+			throw new WebServiceException(e);
+		}
+	}
+	
+	@Override
+	public CatalogueConfiguration create(String json) throws WebServiceException {
+		String ret = super.create(json);
+		return getCatalogueConfigurationFromString(ret);
 	}
 
 	@Override
-	public String create(String json) throws WebServiceException {
-		return super.create(json);
+	public CatalogueConfiguration read() throws WebServiceException {
+		String ret = super.read(CURRENT_CONTEXT_PATH_PARAMETER);
+		return getCatalogueConfigurationFromString(ret);
 	}
 
 	@Override
-	public String read() throws WebServiceException {
-		return super.read(CURRENT_CONTEXT_PATH_PARAMETER);
+	public CatalogueConfiguration update(String json) throws WebServiceException {
+		String ret = super.update(json, CURRENT_CONTEXT_PATH_PARAMETER);
+		return getCatalogueConfigurationFromString(ret);
 	}
 
 	@Override
-	public String update(String json) throws WebServiceException {
-		return super.update(json, CURRENT_CONTEXT_PATH_PARAMETER);
-	}
-
-	@Override
-	public String patch(String json) throws WebServiceException {
-		return super.patch(json, CURRENT_CONTEXT_PATH_PARAMETER);
+	public CatalogueConfiguration patch(String json) throws WebServiceException {
+		String ret = super.patch(json, CURRENT_CONTEXT_PATH_PARAMETER);
+		return getCatalogueConfigurationFromString(ret);
 	}
 
 	@Override