diff --git a/src/YeePHP.php b/src/YeePHP.php
index f2e759d..01a81e9 100644
--- a/src/YeePHP.php
+++ b/src/YeePHP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace SharkEzz\Yeelight;
 
 use Exception;