diff --git a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/Instance.scala b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/Instance.scala
index db29ab8..7325b96 100644
--- a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/Instance.scala
+++ b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/Instance.scala
@@ -54,7 +54,7 @@ trait JsonSupport extends SprayJsonSupport with DefaultJsonProtocol {
     }
   }
 
-  implicit val instanceFormat : JsonFormat[Instance] = jsonFormat7(Instance)
+  implicit val instanceFormat : JsonFormat[Instance] = jsonFormat8(Instance)
 }
 
 final case class Instance (
@@ -64,7 +64,8 @@ final case class Instance (
                             name: String,
                             componentType: InstanceEnums.ComponentType,
                             dockerId: Option[String],
-                            instanceState: InstanceEnums.State
+                            instanceState: InstanceEnums.State,
+                            labels: List[String]
                           )
 object InstanceEnums {
   type ComponentType = ComponentType.Value
diff --git a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
index f01d42d..c908576 100644
--- a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
+++ b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
@@ -147,7 +147,9 @@ object InstanceRegistry extends JsonSupport with AppLogging
     if(!configuration.usingInstanceRegistry) {
       Failure(new RuntimeException("Cannot get ElasticSearch instance from Instance Registry, no Instance Registry available."))
     } else {
-      val request = HttpRequest(method = HttpMethods.GET, configuration.instanceRegistryUri + "/matchingInstance?ComponentType=ElasticSearch")
+      val request = HttpRequest(method = HttpMethods.GET,
+        configuration.instanceRegistryUri +
+          s"/matchingInstance?Id=${configuration.assignedID.getOrElse(-1)}&ComponentType=ElasticSearch")
 
       Await.result(Http(system).singleRequest(request) map {response =>
         response.status match {
@@ -189,18 +191,17 @@ object InstanceRegistry extends JsonSupport with AppLogging
         val idToPost = configuration.elasticsearchInstance.id.getOrElse(-1L)
         val request = HttpRequest(
           method = HttpMethods.POST,
-          configuration.instanceRegistryUri + s"/matchingResult?Id=$idToPost&MatchingSuccessful=$isElasticSearchReachable")
+          configuration.instanceRegistryUri +
+            s"/matchingResult?CallerId=${configuration.assignedID.getOrElse(-1)}&MatchedInstanceId=$idToPost&MatchingSuccessful=$isElasticSearchReachable")
 
         Await.result(Http(system).singleRequest(request) map {response =>
-          val  status=response.status
           if(response.status == StatusCodes.OK){
             log.info(s"Successfully posted matching result to Instance Registry.")
             Success()
           }
           else {
-            val statuscode = response.status
-            log.warning(s"Failed to post matching result to Instance Registry, server returned $statuscode")
-            Failure(new RuntimeException(s"Failed to post matching result to Instance Registry, server returned $statuscode"))
+            log.warning(s"Failed to post matching result to Instance Registry, server returned ${response.status}")
+            Failure(new RuntimeException(s"Failed to post matching result to Instance Registry, server returned ${response.status}"))
           }
 
         } recover {case ex =>
@@ -252,7 +253,7 @@ object InstanceRegistry extends JsonSupport with AppLogging
 
   private def createInstance(id: Option[Long], controlPort : Int, name : String) : Instance =
     Instance(id, InetAddress.getLocalHost.getHostAddress,
-      controlPort, name, ComponentType.WebApi, None, InstanceState.Running)
+      controlPort, name, ComponentType.WebApi, None, InstanceState.Running, List.empty[String])
 
   def reportStart(id: String, configuration: Configuration):Try[ResponseEntity] ={
     val request = HttpRequest(method = HttpMethods.GET, configuration.instanceRegistryUri + "/reportStart")
diff --git a/src/main/scala/de/upb/cs/swt/delphi/webapi/Configuration.scala b/src/main/scala/de/upb/cs/swt/delphi/webapi/Configuration.scala
index 3874191..1cc8b1a 100644
--- a/src/main/scala/de/upb/cs/swt/delphi/webapi/Configuration.scala
+++ b/src/main/scala/de/upb/cs/swt/delphi/webapi/Configuration.scala
@@ -49,7 +49,8 @@ class Configuration( //Server and Elasticsearch configuration
       "Default ElasticSearch instance",
       ComponentType.ElasticSearch,
       None,
-      InstanceState.Running)
+      InstanceState.Running,
+      List.empty[String])
   }
   val defaultElasticSearchPort: Int = 9200
   val defaultElasticSearchHost: String = "elasticsearch://localhost"