diff --git a/src/copyvios/cache.py b/src/copyvios/cache.py
index c326763..6ac2369 100644
--- a/src/copyvios/cache.py
+++ b/src/copyvios/cache.py
@@ -6,6 +6,7 @@ from dataclasses import dataclass, field
 from typing import Any
 
 import sqlalchemy
+import sqlalchemy.event
 from earwigbot.bot import Bot