diff --git a/canvas.js b/canvas.js
index 66274df..c16cc6f 100644
--- a/canvas.js
+++ b/canvas.js
@@ -4,6 +4,7 @@
  */
 
 /** @type {HTMLCanvasElement} */
+const document = window.document;
 export const canvas = document.getElementById('scene');
 
 /** @type {CanvasRenderingContext2D} */