diff --git a/comictalker/comiccacher.py b/comictalker/comiccacher.py
index bdd964b..c6b3030 100644
--- a/comictalker/comiccacher.py
+++ b/comictalker/comiccacher.py
@@ -390,6 +390,8 @@ class ComicCacher:
         set_slots = ""
 
         for key in data:
+            if data[key] is None:
+                continue
 
             if keys != "":
                 keys += ", "