diff --git a/src/Customer.php b/src/Customer.php
index 141ac70..0c328af 100644
--- a/src/Customer.php
+++ b/src/Customer.php
@@ -12,7 +12,7 @@
  */
 class Customer
 {
-    use Gettable;
+    use Gettable, Settable;
 
     /**
      * The Customer ID.
diff --git a/tests/CustomerTest.php b/tests/CustomerTest.php
index 3dbc855..f2d16d3 100644
--- a/tests/CustomerTest.php
+++ b/tests/CustomerTest.php
@@ -20,7 +20,7 @@ public function it_can_instantiate_via_the_constructor()
     public function it_can_instantiate_via_a_static_create_method()
     {
         $customer = Customer::create();
-        
+
         $this->assertEquals(Customer::class, get_class($customer));
         $this->assertObjectHasAttribute('id', $customer);
         $this->assertObjectHasAttribute('email', $customer);