diff --git a/src/main/java/eu/h2020/symbiote/client/ClientConstants.java b/src/main/java/eu/h2020/symbiote/client/ClientConstants.java
index 83eb42a..813424d 100644
--- a/src/main/java/eu/h2020/symbiote/client/ClientConstants.java
+++ b/src/main/java/eu/h2020/symbiote/client/ClientConstants.java
@@ -13,4 +13,5 @@ public interface ClientConstants {
     String RH_CLEAR_PATH = "/clear";
     String RH_LOCAL_RESOURCES_PATH = "/local/resources";
     String RH_LOCAL_RESOURCES_SHARE_PATH = RH_LOCAL_RESOURCES_PATH+"/share";
+    String RH_UPDATE_INTERWORKING_API = RH_RESOURCES_PATH+"/interworkingURL";
 }
diff --git a/src/main/java/eu/h2020/symbiote/client/RegistrationHandlerClient.java b/src/main/java/eu/h2020/symbiote/client/RegistrationHandlerClient.java
index 53a2827..9ef9b8b 100644
--- a/src/main/java/eu/h2020/symbiote/client/RegistrationHandlerClient.java
+++ b/src/main/java/eu/h2020/symbiote/client/RegistrationHandlerClient.java
@@ -9,6 +9,7 @@
 import java.util.List;
 import java.util.Map;
 
+@Headers("Accept: application/json")
 public interface RegistrationHandlerClient {
 
     @RequestLine("GET " + ClientConstants.RH_RESOURCES_PATH)
@@ -75,4 +76,8 @@ public interface RegistrationHandlerClient {
     @Headers("Content-Type: application/json")
     Map<String, List<CloudResource>> unshareResources(Map<String, List<String>> input);
 
+    @RequestLine("PUT " + ClientConstants.RH_UPDATE_INTERWORKING_API)
+    @Headers("Content-Type: text/plain")
+    List<CloudResource> updateInterworkingURL(String url);
+
 }