diff --git a/models/schedule.py b/models/schedule.py
index f54273f..9bfad7e 100644
--- a/models/schedule.py
+++ b/models/schedule.py
@@ -222,7 +222,7 @@ class Lesson:
             f'<a href="https://rasp.pgups.ru/schedule/room?room={quote(room)}">ауд. {html.escape(room)}</a>'
             for room in self.room_ids
         ]
-        groups = [f"гр. {html.escape(group)}" for group in self.group_names]
+        groups = [html.escape(group) for group in self.group_names]
 
         if self.target_kind == "teacher":
             details = rooms + groups