diff --git a/src/index.ts b/src/index.ts
index 4a9ba24..d52923f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,59 +1,24 @@
 import Scopes from "./constants/Scopes";
 import OAuth2, { AuthorizationResponse } from "./libs/OAuth2";
 import Contacts from "./resources/Contacts";
-import { ContactsStatic } from './interfaces/ContactsStatic';
-import ContactTypes from './resources/ContactTypes';
-import ContactSectors from './resources/ContactSectors';
-import ContactGroups from './resources/ContactGroups';
-import ContactRelations from './resources/ContactRelations';
-import Expenses from './resources/Expenses'
+import { ContactsStatic } from "./interfaces/ContactsStatic";
+import ContactTypes from "./resources/ContactTypes";
+import ContactSectors from "./resources/ContactSectors";
+import ContactGroups from "./resources/ContactGroups";
+import ContactRelations from "./resources/ContactRelations";
+import Expenses from "./resources/Expenses";
 import Bills from "./resources/Bills";
-import Orders from './resources/Orders';
-import request from 'request-promise-native'
-import { CookieJar } from 'request';
+import Orders from "./resources/Orders";
+import request from "request-promise-native";
+import { CookieJar } from "request";
 
 export { ContactsStatic, Scopes };
 
 export default class Bexio {
-    private clientId: string
-    private clientSecret: string
-    private redirectUri: string
-    private scopes: Array<Scopes>
-
-    private bexioAuth: OAuth2
-
-    // Resources
-    // Contacts
-    public contacts: Contacts
-    public contactTypes: ContactTypes
-    public contactSectors: ContactSectors
-    public contactGroups: ContactGroups
-    public contactRelations: ContactRelations
-
-    // Sales Order Management
-    public orders: Orders
-    public expenses: Expenses
-
-    constructor(clientId: string, clientSecret: string, redirectUri: string, scopes: Array<Scopes>) {
-        this.clientId = clientId
-        this.clientSecret = clientSecret
-        this.redirectUri = redirectUri
-        this.scopes = scopes
-
-        // add general scope to the request list
-        this.scopes.push(Scopes.GENERAL)
-
-        this.bexioAuth = new OAuth2(this.clientId, this.clientSecret, this.redirectUri, this.scopes)
-
-        // Init resources
-        this.contacts = new Contacts(this.bexioAuth)
-        this.contactTypes = new ContactTypes(this.bexioAuth)
-        this.contactSectors = new ContactSectors(this.bexioAuth)
-        this.contactGroups = new ContactGroups(this.bexioAuth)
-        this.contactRelations = new ContactRelations(this.bexioAuth)
-        this.orders = new Orders(this.bexioAuth)
-        this.expenses = new Expenses(this.bexioAuth)
-    }
+  private clientId: string;
+  private clientSecret: string;
+  private redirectUri: string;
+  private scopes: Array<Scopes>;
 
   private bexioAuth: OAuth2;
 
@@ -67,6 +32,7 @@ export default class Bexio {
 
   // Sales Order Management
   public orders: Orders;
+  public expenses: Expenses;
   public bills: Bills;
 
   constructor(
@@ -97,6 +63,7 @@ export default class Bexio {
     this.contactGroups = new ContactGroups(this.bexioAuth);
     this.contactRelations = new ContactRelations(this.bexioAuth);
     this.orders = new Orders(this.bexioAuth);
+    this.expenses = new Expenses(this.bexioAuth);
     this.bills = new Bills(this.bexioAuth);
   }