diff --git a/package-lock.json b/package-lock.json
index 6a3fa3d..19c2407 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "notificationapi-node-server-sdk",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "notificationapi-node-server-sdk",
-      "version": "1.0.0",
+      "version": "2.0.0",
       "license": "ISC",
       "dependencies": {
         "axios": "^0.21.4"
diff --git a/package.json b/package.json
index efb96aa..d31433d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "notificationapi-node-server-sdk",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "NotificationAPI server-side library for Node.js",
   "keywords": [
     "notificationapi",
diff --git a/src/__tests__/notificationapi.test.ts b/src/__tests__/notificationapi.test.ts
index edab344..11b86af 100644
--- a/src/__tests__/notificationapi.test.ts
+++ b/src/__tests__/notificationapi.test.ts
@@ -509,7 +509,7 @@ describe('setUserPreferences without subNotificationId', () => {
     {
       notificationId: 'notificationId',
       channel: Channels.EMAIL,
-      state: true
+      delivery: 'instant'
     }
   ];
   test('makes API calls to the correct end-point', async () => {
@@ -541,7 +541,7 @@ describe('setUserPreferences with subNotificationId', () => {
     {
       notificationId: 'notificationId',
       channel: Channels.EMAIL,
-      state: true,
+      delivery: 'instant',
       subNotificationId: 'subNotificationId'
     }
   ];
diff --git a/src/interfaces.ts b/src/interfaces.ts
index b6afa9c..c73b519 100644
--- a/src/interfaces.ts
+++ b/src/interfaces.ts
@@ -86,9 +86,8 @@ export interface SetUserPreferencesRequest {
   notificationId: string;
   /** The channel related to the userPreferences. Required.*/
   channel: Channels;
-  /** Determines the . Required.*/
-  state: boolean;
   /**  The subNotificationId is used to specify further subcategories within a notification. Required.*/
+  delivery: 'off' | 'instant' | 'hourly' | 'daily' | 'weekly' | 'monthly';
   subNotificationId?: string;
 }
 /** Supporting notification Channels.*/