diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index 33545d4d2..2b8762204 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -481,8 +481,9 @@ def set_sticker_set_thumbnail(token, name, user_id, thumbnail, format):
 
 def replace_sticker_in_set(token, user_id, name, old_sticker, sticker):
     method_url = r'replaceStickerInSet'
-    payload = {'user_id': user_id, 'name': name, 'old_sticker': old_sticker, 'sticker': sticker.to_json()}
-    return _make_request(token, method_url, params=payload)
+    json_dict, files = sticker.convert_input_sticker()
+    payload = {'user_id': user_id, 'name': name, 'old_sticker': old_sticker, 'sticker': json_dict}
+    return _make_request(token, method_url, params=payload, files=files, method='post')
 
 def set_chat_sticker_set(token, chat_id, sticker_set_name):
     method_url = r'setChatStickerSet'
@@ -573,7 +574,7 @@ def send_checklist(
         reply_parameters=None, reply_markup=None
 ):
     method_url = r'sendChecklist'
-    payload = {'chat_id': chat_id, 'checklist': checklist, 'business_connection_id': business_connection_id}
+    payload = {'chat_id': chat_id, 'checklist': checklist.to_json(), 'business_connection_id': business_connection_id}
     if disable_notification is not None:
         payload['disable_notification'] = disable_notification
     if protect_content is not None:
@@ -592,7 +593,7 @@ def edit_message_checklist(
         reply_markup=None
 ):
     method_url = r'editMessageChecklist'
-    payload = {'chat_id': chat_id, 'message_id': message_id, 'checklist': checklist, 'business_connection_id': business_connection_id}
+    payload = {'chat_id': chat_id, 'message_id': message_id, 'checklist': checklist.to_json(), 'business_connection_id': business_connection_id}
     if reply_markup:
         payload['reply_markup'] = _convert_markup(reply_markup)
     return _make_request(token, method_url, params=payload)
diff --git a/telebot/asyncio_helper.py b/telebot/asyncio_helper.py
index a90935864..918b13742 100644
--- a/telebot/asyncio_helper.py
+++ b/telebot/asyncio_helper.py
@@ -445,8 +445,9 @@ async def get_chat_member_count(token, chat_id):
 
 async def replace_sticker_in_set(token, user_id, name, old_sticker, sticker):
     method_url = r'replaceStickerInSet'
-    payload = {'user_id': user_id, 'name': name, 'old_sticker': old_sticker, 'sticker': sticker.to_json()}
-    return await _process_request(token, method_url, params=payload)
+    json_dict, files = sticker.convert_input_sticker()
+    payload = {'user_id': user_id, 'name': name, 'old_sticker': old_sticker, 'sticker': json_dict}
+    return await _process_request(token, method_url, params=payload, files=files, method='post')
 
 async def set_sticker_set_thumbnail(token, name, user_id, thumbnail, format):
     method_url = r'setStickerSetThumbnail'
@@ -576,7 +577,7 @@ async def send_checklist(
         reply_parameters=None, reply_markup=None
 ):
     method_url = r'sendChecklist'
-    payload = {'chat_id': chat_id, 'checklist': checklist, 'business_connection_id': business_connection_id}
+    payload = {'chat_id': chat_id, 'checklist': checklist.to_json(), 'business_connection_id': business_connection_id}
     if disable_notification is not None:
         payload['disable_notification'] = disable_notification
     if protect_content is not None:
@@ -595,7 +596,7 @@ async def edit_message_checklist(
         reply_markup=None
 ):
     method_url = r'editMessageChecklist'
-    payload = {'chat_id': chat_id, 'message_id': message_id, 'checklist': checklist, 'business_connection_id': business_connection_id}
+    payload = {'chat_id': chat_id, 'message_id': message_id, 'checklist': checklist.to_json(), 'business_connection_id': business_connection_id}
     if reply_markup:
         payload['reply_markup'] = await _convert_markup(reply_markup)
     return await _process_request(token, method_url, params=payload)
diff --git a/tests/test_apihelper_95.py b/tests/test_apihelper_95.py
index 80e1d26f4..ea26d057d 100644
--- a/tests/test_apihelper_95.py
+++ b/tests/test_apihelper_95.py
@@ -1,6 +1,9 @@
+import asyncio
+import io
+import json
 from types import SimpleNamespace
 
-from telebot import apihelper
+from telebot import apihelper, asyncio_helper, types
 
 
 def test_get_multipart_header_formatter_prefers_current_urllib3_name():
@@ -94,3 +97,62 @@ def fake_make_request(token, method_url, params=None, method=None, **kwargs):
     assert captured['params']['chat_id'] == 1
     assert captured['params']['user_id'] == 2
     assert captured['params']['tag'] == 'member-tag'
+
+
+def _capture(captured):
+    def fake_request(token, method_url, params=None, files=None, method=None, **kwargs):
+        captured.update(method_url=method_url, params=params, files=files, method=method)
+        return {'ok': True}
+    return fake_request
+
+
+def _checklist():
+    return types.InputChecklist(title='Groceries', tasks=[types.InputChecklistTask(id=1, text='Milk')])
+
+
+def test_send_and_edit_checklist_send_checklist_as_json(monkeypatch):
+    captured = {}
+    monkeypatch.setattr(apihelper, '_make_request', _capture(captured))
+
+    apihelper.send_checklist('token', 'bc', 1, _checklist())
+    assert json.loads(captured['params']['checklist'])['title'] == 'Groceries'
+
+    apihelper.edit_message_checklist('token', 'bc', 1, 2, _checklist())
+    assert json.loads(captured['params']['checklist'])['tasks'][0]['text'] == 'Milk'
+
+
+def test_replace_sticker_in_set_uploads_the_sticker_file(monkeypatch):
+    captured = {}
+    monkeypatch.setattr(apihelper, '_make_request', _capture(captured))
+    sticker_file = types.InputFile(io.BytesIO(b'sticker'), file_name='sticker.webp')
+    sticker = types.InputSticker(sticker=sticker_file, emoji_list=['\U0001f642'], format='static')
+
+    apihelper.replace_sticker_in_set('token', 1, 'set_by_bot', 'old_id', sticker)
+
+    attach = json.loads(captured['params']['sticker'])['sticker']
+    assert attach.startswith('attach://')
+    assert captured['files'] == {attach[len('attach://'):]: sticker_file}
+    assert captured['method'] == 'post'
+
+
+def test_async_checklist_and_replace_sticker(monkeypatch):
+    captured = {}
+
+    async def fake_process_request(token, url, method='get', params=None, files=None, **kwargs):
+        captured.update(url=url, params=params, files=files, method=method)
+        return True
+
+    monkeypatch.setattr(asyncio_helper, '_process_request', fake_process_request)
+
+    asyncio.run(asyncio_helper.send_checklist('token', 'bc', 1, _checklist()))
+    assert json.loads(captured['params']['checklist'])['title'] == 'Groceries'
+
+    asyncio.run(asyncio_helper.edit_message_checklist('token', 'bc', 1, 2, _checklist()))
+    assert json.loads(captured['params']['checklist'])['title'] == 'Groceries'
+
+    sticker_file = types.InputFile(io.BytesIO(b'sticker'), file_name='sticker.webp')
+    sticker = types.InputSticker(sticker=sticker_file, emoji_list=['\U0001f642'], format='static')
+    asyncio.run(asyncio_helper.replace_sticker_in_set('token', 1, 'set_by_bot', 'old_id', sticker))
+    attach = json.loads(captured['params']['sticker'])['sticker']
+    assert captured['files'] == {attach[len('attach://'):]: sticker_file}
+    assert captured['method'] == 'post'