diff --git a/src/render/canvas/canvas-renderer.ts b/src/render/canvas/canvas-renderer.ts
index 6efb648bf..41e5fe233 100644
--- a/src/render/canvas/canvas-renderer.ts
+++ b/src/render/canvas/canvas-renderer.ts
@@ -598,7 +598,7 @@ export class CanvasRenderer extends Renderer {
                     const [path, x, y, width, height] = calculateBackgroundRendering(container, index, [
                         image.width,
                         image.height,
-                        image.width / image.height
+                        (image.width / image.height) ?? 1
                     ]);
                     const pattern = this.ctx.createPattern(
                         this.resizeImage(image, width, height),
diff --git a/tsconfig.json b/tsconfig.json
index 82e295997..850f5389a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
         "outDir": "dist/lib",
         "declaration": true,
         "declarationDir": "dist/types",
-        "resolveJsonModule": true
+        "resolveJsonModule": true,
     },
     "include": [
         "src"