diff --git a/queue_job/jobrunner/channels.py b/queue_job/jobrunner/channels.py
index b1cee329f..1cce46083 100644
--- a/queue_job/jobrunner/channels.py
+++ b/queue_job/jobrunner/channels.py
@@ -173,6 +173,8 @@ class ChannelJob:
 
     """
 
+    __slots__ = ("db_name", "channel", "uuid", "seq", "date_created", "priority", "eta")
+
     def __init__(self, db_name, channel, uuid, seq, date_created, priority, eta):
         self.db_name = db_name
         self.channel = channel