diff --git a/redbot/cogs/cleanup/converters.py b/redbot/cogs/cleanup/converters.py
index bbd2e4ffc..3b685eaa9 100644
--- a/redbot/cogs/cleanup/converters.py
+++ b/redbot/cogs/cleanup/converters.py
@@ -6,10 +6,12 @@ from redbot.core.utils.chat_formatting import inline
 
 _ = Translator("Cleanup", __file__)
 
+SNOWFLAKE_THRESHOLD = 2 ** 63
+
 
 class RawMessageIds(Converter):
     async def convert(self, ctx: Context, argument: str) -> int:
-        if argument.isnumeric() and len(argument) >= 17:
+        if argument.isnumeric() and len(argument) >= 17 and int(argument) < SNOWFLAKE_THRESHOLD:
             return int(argument)
 
         raise BadArgument(_("{} doesn't look like a valid message ID.").format(argument))