diff --git a/src/WhatsAppCloudApi.php b/src/WhatsAppCloudApi.php
index bd46734..8c4c1b3 100644
--- a/src/WhatsAppCloudApi.php
+++ b/src/WhatsAppCloudApi.php
@@ -14,7 +14,7 @@ class WhatsAppCloudApi
     /**
      * @const string Default Graph API version.
      */
-    public const DEFAULT_GRAPH_VERSION = 'v17.0';
+    public const DEFAULT_GRAPH_VERSION = 'v18.0';
 
     /**
      * @var WhatsAppCloudApiApp The WhatsAppCloudApiApp entity.
diff --git a/tests/Unit/WhatsAppCloudApiTest.php b/tests/Unit/WhatsAppCloudApiTest.php
index c04e2f6..7a4f6e8 100644
--- a/tests/Unit/WhatsAppCloudApiTest.php
+++ b/tests/Unit/WhatsAppCloudApiTest.php
@@ -30,7 +30,7 @@ final class WhatsAppCloudApiTest extends TestCase
 {
     use ProphecyTrait;
 
-    private const TEST_GRAPH_VERSION = 'v17.0';
+    private const TEST_GRAPH_VERSION = 'v18.0';
 
     private $whatsapp_app_cloud_api;
     private $client_handler;