diff --git a/.github/workflows/fix-php-code-style-issues.yml b/.github/workflows/fix-php-code-style-issues.yml
index 2f32b5f..c958238 100644
--- a/.github/workflows/fix-php-code-style-issues.yml
+++ b/.github/workflows/fix-php-code-style-issues.yml
@@ -19,7 +19,7 @@ jobs:
           ref: ${{ github.head_ref }}
 
       - name: Fix PHP code style issues
-        uses: aglipanci/laravel-pint-action@1.0.0
+        uses: aglipanci/laravel-pint-action@2.3.1
 
       - name: Commit changes
         uses: stefanzweifel/git-auto-commit-action@v4
diff --git a/src/EnergyZero.php b/src/EnergyZero.php
index c1bf042..59dd8d0 100755
--- a/src/EnergyZero.php
+++ b/src/EnergyZero.php
@@ -3,8 +3,8 @@
 namespace Baspa\EnergyZero;
 
 use DateTime;
-use Exception;
 use DateTimeZone;
+use Exception;
 use GuzzleHttp\Client;
 use GuzzleHttp\ClientInterface;
 use GuzzleHttp\Exception\RequestException;
@@ -12,11 +12,14 @@
 class EnergyZero
 {
     private bool $vat = true;
+
     private int $requestTimeout = 10;
+
     private string $baseUri = 'https://api.energyzero.nl/v1/';
+
     private ClientInterface $client;
 
-    public function __construct(ClientInterface $client = null)
+    public function __construct(?ClientInterface $client = null)
     {
         $this->client = $client ?? new Client([
             'base_uri' => $this->baseUri,
@@ -42,10 +45,11 @@ public function request(string $uri, array $params = []): ?array
             if ($response->getStatusCode() === 200) {
                 return json_decode($response->getBody()->getContents(), true);
             } else {
-                throw new Exception('Unexpected response status: ' . $response->getStatusCode());
+                throw new Exception('Unexpected response status: '.$response->getStatusCode());
             }
         } catch (RequestException $e) {
-            error_log('Error: ' . $e->getMessage());
+            error_log('Error: '.$e->getMessage());
+
             return null;
         }
     }
@@ -192,4 +196,4 @@ public function getValleyHours(string $startDate, string $endDate, int $topN = 5
 
         return array_slice($prices, 0, $topN);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
index f61b951..1815066 100644
--- a/tests/ExampleTest.php
+++ b/tests/ExampleTest.php
@@ -7,7 +7,7 @@
 use GuzzleHttp\Psr7\Response;
 
 beforeEach(function () {
-    $this->mockHandler = new MockHandler();
+    $this->mockHandler = new MockHandler;
     $handlerStack = HandlerStack::create($this->mockHandler);
     $client = new Client(['handler' => $handlerStack]);
     $this->energyZero = new EnergyZero($client);
@@ -171,4 +171,4 @@
         ['readingDate' => '2023-05-01T00:00:00', 'price' => 0.1],
         ['readingDate' => '2023-05-01T02:00:00', 'price' => 0.2],
     ]);
-});
\ No newline at end of file
+});