diff --git a/telebot/types.py b/telebot/types.py
index eb3fabf..a200b73 100644
--- a/telebot/types.py
+++ b/telebot/types.py
@@ -582,7 +582,8 @@ class Message(JsonDeserializable):
             # "url": "<a href=\"{url}\">{text}</a>", # @badiboy plain URLs have no text and do not need tags
             "text_link": "<a href=\"{url}\">{text}</a>",
             "strikethrough": "<s>{text}</s>",
-            "underline":     "<u>{text}</u>"
+            "underline":     "<u>{text}</u>",
+            "spoiler": "<span class=\"tg-spoiler\">{text}</span>",
         }
          
         if hasattr(self, "custom_subs"):