diff --git a/telethon/extensions/markdown.py b/telethon/extensions/markdown.py
index e1fd04b7..a5dde5c6 100644
--- a/telethon/extensions/markdown.py
+++ b/telethon/extensions/markdown.py
@@ -21,10 +21,7 @@ DEFAULT_DELIMITERS = {
     '```': MessageEntityPre
 }
 
-# Regex used to match r'\[(.+?)\]\((.+?)\)' (for URLs.
-DEFAULT_URL_RE = re.compile(r'\[(.+?)\]\((.+?)\)')
-
-# Reverse operation for DEFAULT_URL_RE. {0} for text, {1} for URL.
+DEFAULT_URL_RE = re.compile(r'\[([^\]]+)\]\((.+?)\)')
 DEFAULT_URL_FORMAT = '[{0}]({1})'