diff --git a/miyu_bot/commands/cogs/event.py b/miyu_bot/commands/cogs/event.py
index 9d049c2..7ee131a 100644
--- a/miyu_bot/commands/cogs/event.py
+++ b/miyu_bot/commands/cogs/event.py
@@ -261,6 +261,7 @@ class Event(commands.Cog):
                       help='!cutoff 50')
     async def cutoff(self, ctx: commands.Context, tier: str = ''):
         def process_tier_arg(tier_arg):
+            tier_arg = tier_arg.lower()
             if tier_arg[0] == 't':
                 tier_arg = tier_arg[1:]
             if tier_arg[-1] == 'k':