diff --git a/rector.php b/rector.php
new file mode 100644
index 0000000..fc43285
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
+use Rector\Config\RectorConfig;
+use Rector\Set\ValueObject\LevelSetList;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->paths([
+        __DIR__ . '/example',
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ]);
+
+    // register a single rule
+    $rectorConfig->rule(InlineConstructorDefaultToPropertyRector::class);
+
+    // define sets of rules
+    //    $rectorConfig->sets([
+    //        LevelSetList::UP_TO_PHP_81
+    //    ]);
+};
diff --git a/src/ValueObjects/Parameter.php b/src/ValueObjects/Parameter.php
new file mode 100644
index 0000000..50554af
--- /dev/null
+++ b/src/ValueObjects/Parameter.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace VicidialApi\ValueObjects;
+
+use VicidialApi\Contracts\StringableContract;
+
+class Parameter implements StringableContract
+{
+    public function __construct(
+        private readonly mixed $value,
+    ) {
+        // ..
+    }
+
+    public static function from(mixed $value): self
+    {
+        return new self($value);
+    }
+
+    /**
+     * @param  array<string|int>  $values
+     */
+    public static function fromArray(array $values): self
+    {
+        return new self(implode(',', $values));
+    }
+
+    public static function fromObject(object $value): self
+    {
+        return new self(json_encode($value) ?: '');
+    }
+
+    public function toString(): string
+    {
+        if (is_scalar($this->value) || $this->value === null) {
+            return strval($this->value);
+        }
+
+        if (is_object($this->value)) {
+            return $this->fromObject($this->value)->toString();
+        }
+
+        if (is_array($this->value)) {
+            return $this->fromArray($this->value)->toString();
+        }
+
+        throw new \InvalidArgumentException('Parameter value must be scalar or null');
+    }
+}
diff --git a/src/ValueObjects/Transporter/Payload.php b/src/ValueObjects/Transporter/Payload.php
index 2e95802..a8682fc 100644
--- a/src/ValueObjects/Transporter/Payload.php
+++ b/src/ValueObjects/Transporter/Payload.php
@@ -10,6 +10,7 @@
 use Psr\Http\Message\StreamInterface;
 use VicidialApi\Enums\Transporter\ContentType;
 use VicidialApi\Enums\Transporter\Method;
+use VicidialApi\ValueObjects\Parameter;
 use VicidialApi\ValueObjects\ResourceUri;
 
 /**
@@ -146,7 +147,7 @@ public function toRequest(BaseUri $baseUri, Headers $headers, QueryParams $query
 
         if ($this->method === Method::GET && ! empty($this->parameters)) {
             foreach ($this->parameters as $key => $value) {
-                $queryParams = $queryParams->withParam($key, $value);
+                $queryParams = $queryParams->withParam($key, Parameter::from($value)->toString());
             }
         }