diff --git a/src/engine/config/assets.ts b/src/engine/config/assets.ts
index 21c7855..5c07c1d 100644
--- a/src/engine/config/assets.ts
+++ b/src/engine/config/assets.ts
@@ -1,7 +1,7 @@
 import { type SpriteSpec, SPRITE_SPECS } from ".";
 import { SOUND_SPECS, SoundSpec } from "./sounds";
 
-let BASE_URL = import.meta.env.BASE_URL || document.location;
+let BASE_URL = import.meta.env.BASE_URL || document.location.toString();
 BASE_URL = BASE_URL.endsWith("/") ? BASE_URL.slice(0, -1) : BASE_URL;
 
 export const FONT = new FontFace(