diff --git a/art/art.py b/art/art.py
index 7adde1c..09c1d75 100644
--- a/art/art.py
+++ b/art/art.py
@@ -40,7 +40,7 @@ class Art(commands.Cog):
         if art_submission_channel is None:
             await interaction.followup.send("Art submission channel not set. Report this error to the server administrators.", ephemeral=True)
             return
-        await art_submission_channel.send(f"Art submission from {interaction.user.mention} ({interaction.user.id}):", file=await art.to_file(filename=interaction.user.id))
+        await art_submission_channel.send(f"Art submission from {interaction.user.mention} ({interaction.user.id}):", file=await art.to_file(filename=str(interaction.user.id)))
         await interaction.followup.send("Art submitted.", ephemeral=True)
 
     @commands.group()