diff --git a/templates.py b/templates.py
index 643a38b..099d673 100644
--- a/templates.py
+++ b/templates.py
@@ -9,6 +9,8 @@ MUMBLE_URL = os.getenv('MUMBLE_BOT_MUMBLE_URL')
 def fmt_list(users: Set[str], bold=True):
     if bold:
         users = [f'*{user}*' for user in users]
+    else:
+        users = list(users)
     if len(users) == 1:
         return users[0]
     return ', '.join(users[:-1]) + f' and {users[-1]}'