diff --git a/README.md b/README.md
index 19f93b4..d8875c0 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ The full version with all supported options is located [here](https://github.com
 ```typescript
 payNL.Transaction.start({
     //the amount in euro
-    amount: 19.95,
+    amount: 1995, // in cents
     
     //we redirect the user back to this url after the payment
     returnUrl: "https://my-return-url.com/return",
@@ -135,7 +135,7 @@ payNL.Transaction.get('123456789X12345e').subscribe(
         console.log('The transaction is paid');
         // refund a part of the transaction
         result.refund({
-            amount: 0.5,
+            amount: 50, // in cents
             description: '50 cents refund'
         });
     }
@@ -175,7 +175,7 @@ After the transaction has been started, you can use the terminalStatusUrl to get
 ```typescript
 // Start transaction and send to the terminal
 payNL.Transaction.start({
-    amount: 0.01,
+    amount: 1, // in cents
     paymentMethodId: 1927,
     //returnUrl and ipAddres are not used for instore payments, but are mandatory
     returnUrl: "not_applicable",
@@ -222,7 +222,7 @@ Only amount, bankaccountHolder and bankaccountNumber are mandatory, the rest of
 
 ```typescript
 payNL.DirectDebit.add({
-    amount: 0.01,
+    amount: 1, // in cents
     bankaccountHolder: "N Name",
     bankaccountNumber: "NL00RABO0000012345678",
     // optional
diff --git a/examples/connect/createOrder.ts b/examples/connect/createOrder.ts
index 94913c5..7b96877 100644
--- a/examples/connect/createOrder.ts
+++ b/examples/connect/createOrder.ts
@@ -10,7 +10,7 @@ try {
         exchangeUrl: 'https://127.0.0.1/exchange',
         expire: new Date(Date.now() + 60 * 60 * 1000), // 1 hour from now
         amount: {
-            value: 1000,
+            value: 1000, // in cents
             currency: 'EUR',
         },
         customer: {
@@ -59,7 +59,7 @@ try {
                     description: 'Product 1',
                     quantity: 1,
                     price: {
-                        value: 1000,
+                        value: 1000, // in cents
                         currency: 'EUR',
                     },
                 },
diff --git a/src/connect/order/Customer.ts b/src/connect/order/Customer.ts
index 77ccd8e..2f3cd68 100644
--- a/src/connect/order/Customer.ts
+++ b/src/connect/order/Customer.ts
@@ -12,7 +12,7 @@ export type Customer = {
     phone?: string | null;
     language?: string | null;
     /** Locale code like "en_US" or "nl_BE" */
-    locale?: `${Lowercase<string>}_${Uppercase<string>}` | null;
+    locale?: string | null;
     ipAddress?: string | null;
     trust?: number;
     reference?: string | null;
diff --git a/src/connect/order/Product.ts b/src/connect/order/Product.ts
index 1e9d44d..5f991c4 100644
--- a/src/connect/order/Product.ts
+++ b/src/connect/order/Product.ts
@@ -8,7 +8,7 @@ export type CreateProduct = {
 export type ResponseProduct = {
     id?: string;
     description?: string;
-    /** https://developer.pay.nl/reference/get_product_types */
+    /** https://developer.pay.nl/reference/product_type_product_types_get */
     type?: string;
     price: CreateAmount;
     quantity?: number;
diff --git a/src/connect/service/ServiceConfig.ts b/src/connect/service/ServiceConfig.ts
index 9bfc6e3..740f859 100644
--- a/src/connect/service/ServiceConfig.ts
+++ b/src/connect/service/ServiceConfig.ts
@@ -1,5 +1,5 @@
 export type ServiceConfig = {
-    mcc: number;
+    mcc: number | null;
     code: string;
     name: string;
     _links: {
@@ -7,7 +7,16 @@ export type ServiceConfig = {
         href: string;
         type: string;
     }[];
-    layout: null;
+    layout: {
+        code: string;
+        name: string;
+        cssUrl: string;
+        icon: string;
+        supportingColor: string;
+        headerTextColor: string;
+        buttonColor: string;
+        buttonTextColor: string;
+    } | null;
     secret: string;
     status: string;
     address: {
@@ -33,21 +42,20 @@ export type ServiceConfig = {
         name: string;
         status: string;
     };
+    publication?: {
+        domainUrl: string;
+    } | null;
     testMode: boolean;
     createdAt: string;
     createdBy: string;
-    deletedAt: null;
-    deletedBy: null;
-    tradeName: null;
+    deletedAt: string | null;
+    deletedBy: string | null;
+    tradeName: { code: string; name: string } | null;
     modifiedAt: string;
     modifiedBy: string;
     contactEmail: string;
     contactPhone: string;
-    translations: {
-        name: {
-            nl_NL: string;
-        };
-    };
+    translations: Translations<'name'>;
     checkoutTexts: never[];
     turnoverGroup: {
         code: string;
@@ -64,12 +72,7 @@ export type ServiceConfig = {
         tag: string;
         name: string;
         image: string;
-        translations: {
-            name: {
-                nl_NL?: string;
-                en_GB?: string;
-            };
-        };
+        translations: Translations<'name'>;
         paymentMethods: {
             id: number;
             name: string;
@@ -79,21 +82,14 @@ export type ServiceConfig = {
                 name: string;
                 image: string;
             }[];
-            settings: null;
+            settings: { key: string; value: string }[] | null;
             maxAmount: number;
             minAmount: number;
             description: string;
-            translations: {
-                name: {
-                    [key: string]: string;
-                };
-                description: {
-                    [key: string]: string;
-                };
-            };
+            translations: Translations<'name' | 'description'>;
             targetCountries: string[];
         }[];
-        requiredFields: null;
+        requiredFields: { fieldName: string; mandatory: 'required' }[] | null;
     }[];
     checkoutSequence: {
         default: {
@@ -102,3 +98,10 @@ export type ServiceConfig = {
         };
     };
 };
+
+export type Translations<T extends string> = Record<T, Record<LanguageCode, string>> | null;
+
+/**
+ * @example nl_NL or en_GB
+ */
+export type LanguageCode = string;
diff --git a/tests/connect/support/fakeConfig.ts b/tests/connect/support/fakeConfig.ts
index 5a552b0..7f6ed95 100644
--- a/tests/connect/support/fakeConfig.ts
+++ b/tests/connect/support/fakeConfig.ts
@@ -1,4 +1,6 @@
-export const fakeConfig = {
+import { ServiceConfig } from '../../../src';
+
+export const fakeConfig: ServiceConfig = {
     code: 'SL-1234-5678',
     secret: ':secret:',
     testMode: false,