diff --git a/src/Sms/SenderSettings/CountrySenderSettings.php b/src/Sms/SenderSettings/CountrySenderSettings.php
index dcf64f5..4947f95 100644
--- a/src/Sms/SenderSettings/CountrySenderSettings.php
+++ b/src/Sms/SenderSettings/CountrySenderSettings.php
@@ -101,8 +101,8 @@ public function toArray(): array
 	}
 
 
-	public function jsonSerialize()
-    {
-        return $this->toArray();
-    }
+	public function jsonSerialize(): array
+	{
+		return $this->toArray();
+	}
 }