diff --git a/tools/grid.py b/tools/grid.py
index 7ab23c8..0bb695a 100644
--- a/tools/grid.py
+++ b/tools/grid.py
@@ -1,5 +1,5 @@
 from __future__ import annotations
-from coordinate import Coordinate
+from .coordinate import Coordinate
 from enum import Enum
 from typing import Union, Any