diff --git a/src/Middleware/CompletePurchaseMiddleware.php b/src/Middleware/CompletePurchaseMiddleware.php
index 2b9c81d..126f2c7 100644
--- a/src/Middleware/CompletePurchaseMiddleware.php
+++ b/src/Middleware/CompletePurchaseMiddleware.php
@@ -29,7 +29,7 @@ public function handle($request, Closure $next, string $gateway)
         /** @var AbstractGateway $gateway */
         $gateway = app('omnipay')->gateway($gateway);
 
-        if (!$gateway->supportsCompletePurchase()) {
+        if (! $gateway->supportsCompletePurchase()) {
             throw new \InvalidArgumentException('Gateway configured not support complete purchase method!');
         }
 
diff --git a/tests/Middleware/CompletePurchaseMiddlewareTest.php b/tests/Middleware/CompletePurchaseMiddlewareTest.php
index e96b77d..933830b 100644
--- a/tests/Middleware/CompletePurchaseMiddlewareTest.php
+++ b/tests/Middleware/CompletePurchaseMiddlewareTest.php
@@ -20,7 +20,6 @@
  */
 class CompletePurchaseMiddlewareTest extends TestCase
 {
-
     public function getEnvironmentSetUp($app): void
     {
         $_GET['partnerCode'] = 'test';