diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/ResourceInitializer.java b/src/main/java/org/gcube/informationsystem/resourceregistry/ResourceInitializer.java
index 8a49fd4..70de1d9 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/ResourceInitializer.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/ResourceInitializer.java
@@ -1,6 +1,7 @@
 package org.gcube.informationsystem.resourceregistry;
 
 import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.MediaType;
 
 import org.gcube.informationsystem.resourceregistry.rest.Access;
 import org.glassfish.jersey.server.ResourceConfig;
@@ -11,6 +12,8 @@ import org.glassfish.jersey.server.ResourceConfig;
 @ApplicationPath("/")
 public class ResourceInitializer extends ResourceConfig  {
 
+	public static final String APPLICATION_JSON_CHARSET_UTF_8 = MediaType.APPLICATION_JSON + "; charset=UTF-8";
+	
 	public ResourceInitializer(){
 		packages(Access.class.getPackage().toString());
 	}
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
index 2d83e23..99ddc66 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/Access.java
@@ -8,8 +8,8 @@ import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
-import javax.ws.rs.core.MediaType;
 
+import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.er.ERNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.query.InvalidQueryException;
@@ -29,7 +29,6 @@ import com.tinkerpop.blueprints.Direction;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
- * @author Lucio Lelii (ISTI - CNR)
  */
 @Path(AccessPath.ACCESS_PATH_PART)
 public class Access {
@@ -65,7 +64,7 @@ public class Access {
 	 *             if the query is invalid or no idempotent
 	 */
 	@GET
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String query(@QueryParam(AccessPath.QUERY_PARAM) String query,
 			@QueryParam(AccessPath.LIMIT_PARAM) int limit,
 			@QueryParam(AccessPath.FETCH_PLAN_PARAM) String fetchPlan)
@@ -84,7 +83,7 @@ public class Access {
 	@GET
 	@Path(AccessPath.INSTANCE_PATH_PART + "/" + "{" + TYPE_PATH_PARAM + "}"
 			+ "/{" + ID_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getInstance(@PathParam(TYPE_PATH_PARAM) String type,
 			@PathParam(ID_PATH_PARAM) String id)
 			throws ERNotFoundException, ResourceRegistryException {
@@ -110,7 +109,7 @@ public class Access {
 	@SuppressWarnings({ "rawtypes" })
 	@GET
 	@Path(AccessPath.INSTANCES_PATH_PART + "/" + "{" + TYPE_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getInstances(@PathParam(TYPE_PATH_PARAM) String type,
 			@QueryParam(AccessPath.POLYMORPHIC_PARAM) Boolean polymorphic,
 			@QueryParam(AccessPath.REFERENCE) String reference,
@@ -170,7 +169,7 @@ public class Access {
 	 */
 	@GET
 	@Path(AccessPath.SCHEMA_PATH_PART + "/{" + TYPE_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String getSchema(@PathParam(TYPE_PATH_PARAM) String type,
 			@QueryParam(AccessPath.POLYMORPHIC_PARAM) Boolean polymorphic)
 			throws SchemaNotFoundException, ResourceRegistryException {
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
index bb59ebd..9cf0005 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ContextManager.java
@@ -12,8 +12,8 @@ import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
-import javax.ws.rs.core.MediaType;
 
+import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextCreationException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextException;
@@ -26,7 +26,6 @@ import org.slf4j.LoggerFactory;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
- * @author Lucio Lelii (ISTI - CNR)
  */
 @Path(ContextPath.CONTEXT_PATH_PART)
 public class ContextManager {
@@ -50,7 +49,7 @@ public class ContextManager {
 	 * @throws Exception
 	 */
 	@PUT
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String create(
 			@QueryParam(ContextPath.PARENT_CONTEXT_ID_PARAM) String parentUUID,
 			@QueryParam(ContextPath.NAME_PARAM) String name)
@@ -67,7 +66,7 @@ public class ContextManager {
 	 */
 	@DELETE
 	@Path("{" + ID_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public boolean delete(@PathParam(ID_PATH_PARAM) String uuid)
 			throws ContextNotFoundException, ContextException {
 		logger.trace("requested to delete context with id {} ", uuid);
@@ -84,7 +83,7 @@ public class ContextManager {
 	 */
 	@POST
 	@Path(ContextPath.RENAME_PATH_PART + "/{" + ID_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String rename(@PathParam(ID_PATH_PARAM) String uuid,
 			@QueryParam(ContextPath.NAME_PARAM) String name)
 			throws ContextNotFoundException, ContextException {
@@ -102,7 +101,7 @@ public class ContextManager {
 	 */
 	@POST
 	@Path(ContextPath.MOVE_PATH_PART + "/{" + ID_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String move(
 			@PathParam(ID_PATH_PARAM) String uuid,
 			@QueryParam(ContextPath.PARENT_CONTEXT_ID_PARAM) String newParentUUID)
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
index 4ed0ec2..225a48b 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
@@ -15,6 +15,7 @@ import org.gcube.informationsystem.model.entity.Facet;
 import org.gcube.informationsystem.model.entity.Resource;
 import org.gcube.informationsystem.model.relation.ConsistsOf;
 import org.gcube.informationsystem.model.relation.IsRelatedTo;
+import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAlreadyPresentException;
@@ -32,7 +33,6 @@ import org.slf4j.LoggerFactory;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
- * @author Lucio Lelii (ISTI - CNR)
  */
 @Path(ERPath.ER_PATH_PART)
 public class ERManager {
@@ -59,8 +59,8 @@ public class ERManager {
 	 */
 	@PUT
 	@Path(ERPath.FACET_PATH_PART + "/{" + TYPE_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String createFacet(@PathParam(TYPE_PATH_PARAM) String type,
 			String json) throws FacetAlreadyPresentException, ResourceRegistryException {
 		logger.info("requested facet creation for type {} defined by {} ",
@@ -85,8 +85,8 @@ public class ERManager {
 	 */
 	@POST
 	@Path(ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String updateFacet(@PathParam(ID_PATH_PARAM) String uuid, String json)
 			throws FacetNotFoundException, ResourceRegistryException {
 		logger.info("requested facet update for id {} with {}", uuid, json);
@@ -130,8 +130,8 @@ public class ERManager {
 	 */
 	@PUT
 	@Path(ERPath.RESOURCE_PATH_PART + "/{" + TYPE_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String createResource(@PathParam(TYPE_PATH_PARAM) String type,
 			String json) throws ResourceAlreadyPresentException, ResourceRegistryException {
 		logger.info("requested resource creation for type {} with json {}",
@@ -153,8 +153,8 @@ public class ERManager {
 	 */
 	@POST
 	@Path(ERPath.RESOURCE_PATH_PART + "/{" + ID_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String updateResource(@PathParam(ID_PATH_PARAM) String uuid,
 			String json) throws ResourceNotFoundException,
 			ResourceRegistryException {
@@ -206,7 +206,8 @@ public class ERManager {
 	@Path(ERPath.CONSISTS_OF_PATH_PART + "/" + ERPath.SOURCE_PATH_PART
 			+ "/{" + SOURCE_ID_PATH_PARAM + "}/" + ERPath.TARGET_PATH_PART
 			+ "/{" + TARGET_ID_PATH_PARAM + "}/{" + TYPE_PATH_PARAM + "}")
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String attachFacet(
 			@PathParam(SOURCE_ID_PATH_PARAM) String resourceUUID,
 			@PathParam(TARGET_ID_PATH_PARAM) String facetUUID,
@@ -262,8 +263,8 @@ public class ERManager {
 			+ ERPath.SOURCE_PATH_PART + "/{" + SOURCE_ID_PATH_PARAM + "}/"
 			+ ERPath.TARGET_PATH_PART + "/{" + TARGET_ID_PATH_PARAM + "}/{"
 			+ TYPE_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String attachResource(
 			@PathParam(SOURCE_ID_PATH_PARAM) String sourceResourceUUID,
 			@PathParam(TARGET_ID_PATH_PARAM) String targetResourceUUID,
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
index 3028fc2..d7550ae 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SchemaManager.java
@@ -9,6 +9,7 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
 
 import org.gcube.informationsystem.model.AccessType;
+import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaException;
 import org.gcube.informationsystem.resourceregistry.api.rest.SchemaPath;
@@ -19,11 +20,6 @@ import org.slf4j.LoggerFactory;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
- * @author Lucio Lelii (ISTI - CNR)
- */
-/**
- * @author Luca Frosini (ISTI - CNR)
- *
  */
 @ApplicationPath(SchemaPath.SCHEMA_PATH_PART)
 public class SchemaManager {
@@ -43,8 +39,8 @@ public class SchemaManager {
 	 */
 	@PUT
 	@Path("{" + TYPE_PATH_PARAM + "}")
-	@Consumes({ MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON })
-	@Produces(MediaType.APPLICATION_JSON)
+	@Consumes({ MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8 })
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String create(
 			@PathParam(TYPE_PATH_PARAM) String type,
 			String json)
diff --git a/src/main/resources/config.properties.example b/src/main/resources/config.properties.example
index 72c8b12..68345d6 100644
--- a/src/main/resources/config.properties.example
+++ b/src/main/resources/config.properties.example
@@ -6,12 +6,14 @@ HTTP_PORT=:2480
 DB=IS
 
 # OrientDB root access. Needed to be able to create new databases 
-USERNAME=root
-PASSWORD=rootpwd
+ROOT_USERNAME=root
+ROOT_PASSWORD=rootpwd
+
+DEFAULT_ADMIN_USERNAME=admin
+CHANGED_ADMIN_USERNAME=CHANGE_ME
+
+DEFAULT_ADMIN_PASSWORD=admin
+CHANGED_ADMIN_PASSWORD=CHANGE_ME
 
 DEFAULT_CREATED_WRITER_USER_PASSWORD=CHANGE_ME
 DEFAULT_CREATED_READER_USER_PASSWORD=CHANGE_ME
-
-DEFAULT_ADMIN_USERNAME=admin
-DEFAULT_ADMIN_PASSWORD=admin
-CHANGED_ADMIN_PASSWORD=CHANGE_ME
\ No newline at end of file
diff --git a/src/test/java/org/gcube/informationsystem/resourceregistry/context/ContextManagementImplTest.java b/src/test/java/org/gcube/informationsystem/resourceregistry/context/ContextManagementImplTest.java
index f7b1bce..3eaed04 100644
--- a/src/test/java/org/gcube/informationsystem/resourceregistry/context/ContextManagementImplTest.java
+++ b/src/test/java/org/gcube/informationsystem/resourceregistry/context/ContextManagementImplTest.java
@@ -194,7 +194,7 @@ public class ContextManagementImplTest {
 		logger.debug("The DB should be now clean");
 	}
 
-	//@Test
+	@Test
 	public void createDevContext() throws Exception {
 		String gcubeJson = contextManagementImpl.create(null, "gcube");
 		Context gcubeContext = ISMapper.unmarshal(Context.class, gcubeJson);