diff --git a/telebot/apihelper.py b/telebot/apihelper.py
index 140479f..4cbf670 100644
--- a/telebot/apihelper.py
+++ b/telebot/apihelper.py
@@ -1277,7 +1277,7 @@ def send_poll(
     payload = {
         'chat_id': str(chat_id),
         'question': question,
-        'options': json.dumps(options)}
+        'options': json.dumps(_convert_poll_options(options))}
 
     if is_anonymous is not None:
         payload['is_anonymous'] = is_anonymous
@@ -1347,6 +1347,20 @@ def _convert_entites(entites):
         return entites
 
 
+def _convert_poll_options(poll_options):
+    if poll_options is None:
+        return None
+    elif len(poll_options) == 0:
+        return []
+    elif isinstance(poll_options[0], str):
+        # Compatibility mode with previous bug when only list of string was accepted as poll_options
+        return poll_options
+    elif isinstance(poll_options[0], types.JsonSerializable):
+        return [option.text for option in poll_options]
+    else:
+        return poll_options
+
+
 def convert_input_media(media):
     if isinstance(media, types.InputMedia):
         return media.convert_input_media()
diff --git a/telebot/types.py b/telebot/types.py
index 9cad691..5e3b333 100644
--- a/telebot/types.py
+++ b/telebot/types.py
@@ -2527,7 +2527,8 @@ class InputMediaDocument(InputMedia):
         return ret
 
 
-class PollOption(JsonSerializable, JsonDeserializable):
+class PollOption(JsonDeserializable):
+#class PollOption(JsonSerializable, JsonDeserializable):
     @classmethod
     def de_json(cls, json_string):
         if (json_string is None): return None
@@ -2539,10 +2540,10 @@ class PollOption(JsonSerializable, JsonDeserializable):
     def __init__(self, text, voter_count = 0):
         self.text = text
         self.voter_count = voter_count
-
-    def to_json(self):
-        # send_poll Option is a simple string: https://core.telegram.org/bots/api#sendpoll
-        return json.dumps(self.text)
+    # Converted in _convert_poll_options
+    # def to_json(self):
+    #     # send_poll Option is a simple string: https://core.telegram.org/bots/api#sendpoll
+    #     return json.dumps(self.text)
 
 
 class Poll(JsonDeserializable):