diff --git a/src/Cloudwa.php b/src/Cloudwa.php
index 9fc3ddb..e2a970f 100644
--- a/src/Cloudwa.php
+++ b/src/Cloudwa.php
@@ -85,7 +85,7 @@ public function phone(array|string $phone): static
         return $this;
     }
 
-    public function templateParameters(array|null $templateParameters): static
+    public function templateParameters(?array $templateParameters): static
     {
         $this->templateParameters = array_merge($this->templateParameters ?? [], Arr::wrap(($templateParameters ?? [])));