From 42cab5e943f48c2459f993df243686dd70a63404 Mon Sep 17 00:00:00 2001
From: Amirsoroush <amirsoroush.dev@gmail.com>
Date: Tue, 14 Jan 2025 21:36:53 +0300
Subject: [PATCH] fix the `BAD_PATTERN` regex

---
 aiogram/utils/deep_linking.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/aiogram/utils/deep_linking.py b/aiogram/utils/deep_linking.py
index 19cc64c6..fe2764f7 100644
--- a/aiogram/utils/deep_linking.py
+++ b/aiogram/utils/deep_linking.py
@@ -18,7 +18,7 @@ from aiogram.utils.payload import decode_payload, encode_payload
 if TYPE_CHECKING:
     from aiogram import Bot
 
-BAD_PATTERN = re.compile(r"[^A-z0-9-]")
+BAD_PATTERN = re.compile(r"[^a-zA-Z0-9-_]")
 
 
 async def create_start_link(