diff --git a/aiogram/utils/text_decorations.py b/aiogram/utils/text_decorations.py
index 70f96388..97430a32 100644
--- a/aiogram/utils/text_decorations.py
+++ b/aiogram/utils/text_decorations.py
@@ -233,7 +233,7 @@ class MarkdownDecoration(TextDecoration):
         return f"~{value}~"
 
     def spoiler(self, value: str) -> str:
-        return f"|{value}|"
+        return f"||{value}||"
 
     def quote(self, value: str) -> str:
         return re.sub(pattern=self.MARKDOWN_QUOTE_PATTERN, repl=r"\\\1", string=value)