From b2798e39a83cd8085983c7cbe7bc22b2e0ce0e2e Mon Sep 17 00:00:00 2001
From: Alex Root Junior <jroot.junior@gmail.com>
Date: Sat, 5 Aug 2017 04:14:44 +0300
Subject: [PATCH] Fix send_file method for requests without files. (For e.g.
 setWebhook)

---
 aiogram/bot/base.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/aiogram/bot/base.py b/aiogram/bot/base.py
index dba39d1d..bd70b4d4 100644
--- a/aiogram/bot/base.py
+++ b/aiogram/bot/base.py
@@ -151,7 +151,9 @@ class BaseBot:
         :param payload: request payload
         :return: resonse
         """
-        if isinstance(file, str):
+        if file is None:
+            files = {}
+        elif isinstance(file, str):
             # You can use file ID or URL in the most of requests
             payload[file_type] = file
             files = None