diff --git a/notify-by-telegram.py b/notify-by-telegram.py
index aac48ad..9d11874 100755
--- a/notify-by-telegram.py
+++ b/notify-by-telegram.py
@@ -73,7 +73,7 @@ def setup_logging(args):
 
 
 def markdown_escape(text):
-    for special_char in ['\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '#', '+', '-', '.', '!']:
+    for special_char in ['\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '#', '+', '-', '.', '!', '=']:
         text = text.replace(special_char, fr'\{special_char}')
     return text