diff --git a/src/TgBotLib/Objects/ChatPhoto.php b/src/TgBotLib/Objects/ChatPhoto.php
index e3a241a..fdc98cf 100644
--- a/src/TgBotLib/Objects/ChatPhoto.php
+++ b/src/TgBotLib/Objects/ChatPhoto.php
@@ -2,7 +2,9 @@
 
     namespace TgBotLib\Objects;
 
-    class ChatPhoto
+    use TgBotLib\Interfaces\ObjectTypeInterface;
+
+    class ChatPhoto implements ObjectTypeInterface
     {
         /**
          * @var string