diff --git a/capifcorejava/src/main/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManager.java b/capifcorejava/src/main/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManager.java
index 7baa551..c16d565 100644
--- a/capifcorejava/src/main/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManager.java
+++ b/capifcorejava/src/main/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManager.java
@@ -96,6 +96,20 @@
         return new ResponseEntity<>(HttpStatus.NO_CONTENT);
     }
 
+    @Override
+    public ResponseEntity<APIInvokerEnrolmentDetails> onboardedInvokersOnboardingIdPut(String onboardingId,
+            APIInvokerEnrolmentDetails apIInvokerEnrolmentDetails) {
+
+        if (!onboardingId.equals(apIInvokerEnrolmentDetails.getApiInvokerId())) {
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invoker ApiInvokerId not matching");
+        }
+        if (onboardedInvokers.containsKey(onboardingId)) {
+            onboardedInvokers.put(apIInvokerEnrolmentDetails.getApiInvokerId(), apIInvokerEnrolmentDetails);
+        } else {
+            throw new ResponseStatusException(HttpStatus.NOT_FOUND, "The invoker to update has not been onboarded");
+        }
+        return ResponseEntity.ok(apIInvokerEnrolmentDetails);
+    }
 
     @Override
     public ResponseEntity<APIInvokerEnrolmentDetails> modifyIndApiInvokeEnrolment(String onboardingId,
diff --git a/capifcorejava/src/test/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManagerTest.java b/capifcorejava/src/test/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManagerTest.java
index 40d1297..1cf102b 100644
--- a/capifcorejava/src/test/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManagerTest.java
+++ b/capifcorejava/src/test/java/org/oransc/nonrtric/plt/capifcore/controller/InvokerManagerTest.java
@@ -53,6 +53,7 @@
         apiRegister = mock(ApiRegister.class);
         managerUnderTest = new InvokerManager(apiRegister);
         apiInvokerEnrolmentDetails.apiInvokerInformation("apiInvokerInformation");
+        apiInvokerEnrolmentDetails.setApiInvokerId("api_invoker_id_apiInvokerInformation");
 
     }
 
@@ -79,4 +80,14 @@
 
     }
 
+    @Test
+    @DisplayName("Update the invoker")
+    void testUpdateTheInvoker() {
+        managerUnderTest.onboardedInvokersPost(apiInvokerEnrolmentDetails);
+        ResponseEntity<APIInvokerEnrolmentDetails> response = managerUnderTest
+                .onboardedInvokersOnboardingIdPut("api_invoker_id_apiInvokerInformation", apiInvokerEnrolmentDetails);
+        assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);
+
+    }
+
 }