diff --git a/helper.py b/helper.py
index 23f2563..e0b2f6f 100644
--- a/helper.py
+++ b/helper.py
@@ -1,11 +1,16 @@
 import discord
+from discord import NotFound
+
 import config
 
 
 def auto_delete(f):
 	async def wrapper(*args, **kwargs):
 		ret = await f(*args, **kwargs)
-		await kwargs["message"].delete()
+		try:
+			await kwargs["message"].delete()
+		except NotFound:
+			pass
 		return ret
 
 	return wrapper
diff --git a/main.py b/main.py
index 11668df..75ba359 100644
--- a/main.py
+++ b/main.py
@@ -47,7 +47,10 @@ async def join_event(*,
 					 guild: discord.Guild,
 					 channel: discord.TextChannel,
 					 **_):
-	event: int = number_emojis.index(reaction.emoji) + 1
+	try:
+		event: int = number_emojis.index(reaction.emoji) + 1
+	except ValueError:
+		return
 	role: str = discord.utils.get(guild.roles, name=f"{config.PARTICIPANT_PREFIX}{event}")
 	if role is None or role in member.roles:
 		return
diff --git a/nemo.py b/nemo.py
index e93924d..99890be 100644
--- a/nemo.py
+++ b/nemo.py
@@ -53,7 +53,11 @@ class Nemo(discord.Client):
 						await vote.remove(member)
 			return
 		try:
-			await handler[1](reaction=reaction, member=member, message=reaction.message, guild=reaction.message.guild, channel=reaction.message.channel)
+			await handler[1](reaction=reaction,
+							 member=member,
+							 message=reaction.message,
+							 guild=reaction.message.guild,
+							 channel=reaction.message.channel)
 		except Exception:
 			await reaction.message.channel.send(f"Fatal error: {traceback.format_exc()}")
 			raise