diff --git a/aiogram/types/input_file.py b/aiogram/types/input_file.py
index aaf0bf86..9d42c6b7 100644
--- a/aiogram/types/input_file.py
+++ b/aiogram/types/input_file.py
@@ -139,7 +139,7 @@ class InputFile(base.TelegramObject):
             self.file.seek(0)
 
     @classmethod
-    async def _process_stream(cls, response, writer, chunk_size=65536):
+    async def _process_stream(cls, response, writer, chunk_size=CHUNK_SIZE):
         """
         Transfer data