diff --git a/README.md b/README.md
index f462048..29efd33 100644
--- a/README.md
+++ b/README.md
@@ -14,9 +14,28 @@ composer require morningtrain/economic
 
 ## Usage
 
+### Updating a resource
+Some resources can be updated after creation. This can be done as follows:
+
+```php
+$customer = new \Morningtrain\Economic\Resources\Customer([
+    'customerNumber' => 1,
+]);
+
+$customer->name = 'New name';
+
+$customer->save();
+```
+
+This will update the customer name in E-conomic. You can also simply provide all the new values when instantiating the customer.
+
 ```php
-$skeleton = new Morningtrain\Economic();
-echo $skeleton->echoPhrase('Hello, Morningtrain!');
+$customer = new \Morningtrain\Economic\Resources\Customer([
+    'customerNumber' => 1,
+    'name' => 'New Name',
+]);
+
+$customer->save();
 ```
 
 ## Testing
diff --git a/src/Resources/Customer.php b/src/Resources/Customer.php
index 977f27e..4101b25 100644
--- a/src/Resources/Customer.php
+++ b/src/Resources/Customer.php
@@ -9,23 +9,26 @@
 use Morningtrain\Economic\Attributes\Resources\GetSingle;
 use Morningtrain\Economic\Attributes\Resources\Properties\PrimaryKey;
 use Morningtrain\Economic\Attributes\Resources\Properties\ResourceType;
+use Morningtrain\Economic\Attributes\Resources\Update;
 use Morningtrain\Economic\Classes\EconomicCollection;
 use Morningtrain\Economic\Resources\Customer\Contact;
 use Morningtrain\Economic\Traits\Resources\Creatable;
 use Morningtrain\Economic\Traits\Resources\GetCollectionable;
 use Morningtrain\Economic\Traits\Resources\GetSingleable;
+use Morningtrain\Economic\Traits\Resources\Updatable;
 
 #[GetCollection('customers')]
 #[GetSingle('customers/:customerNumber')]
 #[Create('customers')]
+#[Update('customers/:customerNumber')]
 class Customer extends Resource
 {
     /**
      * @use GetCollectionable<Customer>
      */
-    use Creatable, GetCollectionable, GetSingleable;
+    use Creatable, GetCollectionable, GetSingleable, Updatable;
 
-    public string $address;
+    public ?string $address;
 
     public Contact $attention;
 
@@ -33,7 +36,7 @@ class Customer extends Resource
 
     public bool $barred;
 
-    public string $city;
+    public ?string $city;
 
     /**
      * @var EconomicCollection<Contact>
@@ -41,11 +44,11 @@ class Customer extends Resource
     #[ResourceType(Contact::class)]
     public EconomicCollection $contacts;
 
-    public string $corporateIdentificationNumber;
+    public ?string $corporateIdentificationNumber;
 
-    public string $country;
+    public ?string $country;
 
-    public float $creditLimit;
+    public ?float $creditLimit;
 
     public string $currency;
 
@@ -62,45 +65,45 @@ class Customer extends Resource
 
     public float $dueAmount;
 
-    public string $ean;
+    public ?string $ean;
 
     public bool $eInvoicingDisabledByDefault;
 
-    public string $email;
+    public ?string $email;
 
     // TODO: implement $invoices (Invoice)
 
     public DateTime $lastUpdated;
 
-    public Layout $layout;
+    public ?Layout $layout;
 
-    public string $mobilePhone;
+    public ?string $mobilePhone;
 
     public string $name;
 
     public PaymentTerm $paymentTerms;
 
-    public string $pNumber;
+    public ?string $pNumber;
 
-    public string $publicEntryNumber;
+    public ?string $publicEntryNumber;
 
     // TODO: implement $salesPerson (Employee)
 
-    public string $telephoneAndFaxNumber;
+    public ?string $telephoneAndFaxNumber;
 
     // TODO: impelement $tempaltes
 
     public array $totals;
 
-    public string $vatNumber;
+    public ?string $vatNumber;
 
     public VatZone $vatZone;
 
-    public string $website;
+    public ?string $website;
 
-    public string $zip;
+    public ?string $zip;
 
-    public Employee $salesPerson;
+    public ?Employee $salesPerson;
 
     public static function create(
         string $name,
@@ -132,4 +135,58 @@ public static function create(
 
         return static::createRequest($creationParameters);
     }
+
+    public static function new(
+        string $name,
+        CustomerGroup|int $customerGroup,
+        string $currency,
+        VatZone|int $vatZone,
+        PaymentTerm|int $paymentTerms,
+        ?string $email = null,
+        ?string $address = null,
+        ?string $zip = null,
+        ?string $city = null,
+        ?string $country = null,
+        ?string $corporateIdentificationNumber = null,
+        ?string $pNumber = null,
+        ?string $vatNumber = null,
+        ?string $ean = null,
+        ?string $publicEntryNumber = null,
+        ?string $website = null,
+        ?string $mobilePhone = null,
+        ?string $telephoneAndFaxNumber = null,
+        ?bool $barred = null,
+        ?bool $eInvoicingDisabledByDefault = null,
+        ?float $creditLimit = null,
+        ?int $customerNumber = null,
+        Layout|int|null $layout = null,
+        Employee|int|null $salesPerson = null,
+    ): static {
+        return new static([
+            'name' => $name,
+            'customerGroup' => $customerGroup,
+            'currency' => $currency,
+            'vatZone' => $vatZone,
+            'paymentTerms' => $paymentTerms,
+            'email' => $email,
+            'address' => $address,
+            'zip' => $zip,
+            'city' => $city,
+            'country' => $country,
+            'corporateIdentificationNumber' => $corporateIdentificationNumber,
+            'pNumber' => $pNumber,
+            'vatNumber' => $vatNumber,
+            'ean' => $ean,
+            'publicEntryNumber' => $publicEntryNumber,
+            'website' => $website,
+            'mobilePhone' => $mobilePhone,
+            'telephoneAndFaxNumber' => $telephoneAndFaxNumber,
+            'barred' => $barred,
+            'eInvoicingDisabledByDefault' => $eInvoicingDisabledByDefault,
+            'creditLimit' => $creditLimit,
+            'customerNumber' => $customerNumber,
+            'layout' => $layout,
+            'salesPerson' => $salesPerson,
+        ]);
+    }
 }
diff --git a/src/Traits/Resources/Updatable.php b/src/Traits/Resources/Updatable.php
index 10e4504..e63019b 100644
--- a/src/Traits/Resources/Updatable.php
+++ b/src/Traits/Resources/Updatable.php
@@ -28,6 +28,6 @@ public function save()
             throw new Exception('Economic API Service returned a non 200 status code when updating a resource');
         }
 
-        return true;
+        return new static($response->getBody());
     }
 }
diff --git a/tests/Fixtures/Customers/update.json b/tests/Fixtures/Customers/update.json
new file mode 100644
index 0000000..9a6952e
--- /dev/null
+++ b/tests/Fixtures/Customers/update.json
@@ -0,0 +1,56 @@
+{
+  "customerNumber": 1,
+  "currency": "DKK",
+  "paymentTerms": {
+    "paymentTermsNumber": 1,
+    "self": "https:\/\/restapi.e-conomic.com\/payment-terms\/1"
+  },
+  "customerGroup": {
+    "customerGroupNumber": 1,
+    "self": "https:\/\/restapi.e-conomic.com\/customer-groups\/1"
+  },
+  "balance": 1300,
+  "dueAmount": 1300,
+  "creditLimit": 0,
+  "name": "John Doe Renamed",
+  "vatZone": {
+    "vatZoneNumber": 1,
+    "self": "https:\/\/restapi.e-conomic.com\/vat-zones\/2"
+  },
+  "layout": {
+    "layoutNumber": 14,
+    "self": "https:\/\/restapi.e-conomic.com\/layouts\/14"
+  },
+  "lastUpdated": "2021-12-29T08:24:42Z",
+  "contacts": "https:\/\/restapi.e-conomic.com\/customers\/1\/contacts",
+  "templates": {
+    "invoice": "https:\/\/restapi.e-conomic.com\/customers\/1\/templates\/invoice",
+    "invoiceLine": "https:\/\/restapi.e-conomic.com\/customers\/1\/templates\/invoiceline",
+    "self": "https:\/\/restapi.e-conomic.com\/customers\/1\/templates"
+  },
+  "totals": {
+    "drafts": "https:\/\/restapi.e-conomic.com\/invoices\/totals\/drafts\/customers\/1",
+    "booked": "https:\/\/restapi.e-conomic.com\/invoices\/totals\/booked\/customers\/1",
+    "self": "https:\/\/restapi.e-conomic.com\/customers\/1\/totals"
+  },
+  "deliveryLocations": "https:\/\/restapi.e-conomic.com\/customers\/1\/delivery-locations",
+  "invoices": {
+    "drafts": "https:\/\/restapi.e-conomic.com\/customers\/1\/invoices\/drafts",
+    "booked": "https:\/\/restapi.e-conomic.com\/customers\/1\/invoices\/booked",
+    "self": "https:\/\/restapi.e-conomic.com\/customers\/1\/invoices"
+  },
+  "eInvoicingDisabledByDefault": false,
+  "metaData": {
+    "delete": {
+      "description": "Delete this customer.",
+      "href": "https:\/\/restapi.e-conomic.com\/customers\/1",
+      "httpMethod": "delete"
+    },
+    "replace": {
+      "description": "Replace this customer.",
+      "href": "https:\/\/restapi.e-conomic.com\/customers\/1",
+      "httpMethod": "put"
+    }
+  },
+  "self": "https:\/\/restapi.e-conomic.com\/customers\/1"
+}
diff --git a/tests/Unit/CustomerTest.php b/tests/Unit/CustomerTest.php
index 871e2c2..d9f667b 100644
--- a/tests/Unit/CustomerTest.php
+++ b/tests/Unit/CustomerTest.php
@@ -88,3 +88,29 @@
         ->paymentTerms->toBeInstanceOf(PaymentTerm::class)
         ->paymentTerms->paymentTermsNumber->toBe(1);
 });
+
+it('can update a customer', function () {
+    $this->driver->expects()->put()
+        ->withArgs(function (string $url, array $body) {
+            return $url === 'https://restapi.e-conomic.com/customers/1'
+                && $body === [
+                    'customerNumber' => 1,
+                    'name' => 'John Doe Renamed',
+                    'self' => 'customers/1',
+                ];
+        })
+        ->once()
+        ->andReturn(new EconomicResponse(200, fixture('Customers/update')));
+
+    $customer = new Customer([
+        'customerNumber' => 1,
+        'name' => 'John Doe Renamed',
+    ]);
+
+    $updatedCustomer = $customer->save();
+
+    expect($updatedCustomer)
+        ->toBeInstanceOf(Customer::class)
+        ->customerNumber->toBe(1)
+        ->name->toBe('John Doe Renamed');
+});