diff --git a/notification-core/src/main/java/org/opengroup/osdu/notification/pubsub/IPubsubHandshakeHandler.java b/notification-core/src/main/java/org/opengroup/osdu/notification/pubsub/IPubsubHandshakeHandler.java
index bf560c3435aba580d112b44871285363d1f58158..a08238247a7744207a8fd920a4e3e6fa2135ea37 100644
--- a/notification-core/src/main/java/org/opengroup/osdu/notification/pubsub/IPubsubHandshakeHandler.java
+++ b/notification-core/src/main/java/org/opengroup/osdu/notification/pubsub/IPubsubHandshakeHandler.java
@@ -4,5 +4,5 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Component;
 
 public interface IPubsubHandshakeHandler {
-    ResponseEntity getHandshakeResponse();
+    String getHandshakeResponse();
 }
diff --git a/provider/notification-azure/src/main/java/org/opengroup/osdu/notification/provider/azure/pubsub/PubsubHandshakeHandler.java b/provider/notification-azure/src/main/java/org/opengroup/osdu/notification/provider/azure/pubsub/PubsubHandshakeHandler.java
index 8907662353338194c8b6b065d9f23b0a9dd191d6..d902b45066d00a3ce733d988c5c2747e2796306b 100644
--- a/provider/notification-azure/src/main/java/org/opengroup/osdu/notification/provider/azure/pubsub/PubsubHandshakeHandler.java
+++ b/provider/notification-azure/src/main/java/org/opengroup/osdu/notification/provider/azure/pubsub/PubsubHandshakeHandler.java
@@ -10,7 +10,8 @@ import org.springframework.stereotype.Component;
 public class PubsubHandshakeHandler implements IPubsubHandshakeHandler {
 
     @Override
-    public ResponseEntity getHandshakeResponse() {
+    public String getHandshakeResponse() {
+
         return null;
     }
 }
diff --git a/provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/PubsubHandshakeHandler.java b/provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/PubsubHandshakeHandler.java
index 55f9890392dcc22f597ae773e63eb5bcd3a960d4..9c78507c7540d2e2bc2bd0c72f10db1427c2c911 100644
--- a/provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/PubsubHandshakeHandler.java
+++ b/provider/notification-gcp/src/main/java/org/opengroup/osdu/notification/provider/gcp/pubsub/PubsubHandshakeHandler.java
@@ -10,7 +10,7 @@ import org.springframework.stereotype.Component;
 public class PubsubHandshakeHandler implements IPubsubHandshakeHandler {
 
     @Override
-    public ResponseEntity getHandshakeResponse() {
+    public String getHandshakeResponse() {
         return null;
     }
 }