diff --git a/app/paths/errors.py b/app/paths/errors.py
index d2de3c8..9c1a354 100644
--- a/app/paths/errors.py
+++ b/app/paths/errors.py
@@ -1,6 +1,7 @@
 """Custom error pages for FastAPI app"""
 
 from pathlib import Path
+from typing import List
 
 from fastapi import Request, Response
 from fastapi import HTTPException
@@ -10,7 +11,7 @@ from .. import respond
 from .. import common
 
 # Add other HTTP error codes
-codes = [404, 500]
+codes: List[int] = [404, 500]
 
 
 class ErrorsPaths(Paths):