diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index 570a9d6..ac1c70f 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -671,7 +671,8 @@ def promote_chat_member(
 def set_chat_administrator_custom_title(token, chat_id, user_id, custom_title):
     method_url = 'setChatAdministratorCustomTitle'
     payload = {
-        'chat_id': chat_id, 'user_id': user_id, 'custom_title': custom_title}
+        'chat_id': chat_id, 'user_id': user_id, 'custom_title': custom_title
+    }
     return _make_request(token, method_url, params=payload, method='post')
 
 
@@ -679,7 +680,8 @@ def set_chat_permissions(token, chat_id, permissions):
     method_url = 'setChatPermissions'
     payload = {
         'chat_id': chat_id,
-        'permissions': _convert_list_json_serializable(permissions)}
+        'permissions': permissions.to_json()
+    }
     return _make_request(token, method_url, params=payload, method='post')
 
 
diff --git a/tests/test_telebot.py b/tests/test_telebot.py
index e9f3c5a..a3d877f 100644
--- a/tests/test_telebot.py
+++ b/tests/test_telebot.py
@@ -553,3 +553,8 @@ class TestTeleBot:
         tb.process_new_updates([update])
         time.sleep(1)
         assert update.message.text == 'got' * 2
+
+    def test_chat_permissions(self):
+        tb = telebot.TeleBot(TOKEN)
+        permissions = types.ChatPermissions(can_send_messages=True, can_send_polls=False)
+        msg = tb.set_chat_permissions(CHAT_ID, permissions)