diff --git a/packages/frontend-embed/src/workers/draw-blurhash.ts b/packages/frontend-embed/src/workers/draw-blurhash.ts
index 22de6cd3a8..6e49f6bf66 100644
--- a/packages/frontend-embed/src/workers/draw-blurhash.ts
+++ b/packages/frontend-embed/src/workers/draw-blurhash.ts
@@ -18,5 +18,5 @@ onmessage = (event) => {
 
 	render(event.data.hash, canvas);
 	const bitmap = canvas.transferToImageBitmap();
-	postMessage({ id: event.data.id, bitmap });
+	postMessage({ id: event.data.id, bitmap }, [bitmap]);
 };
diff --git a/packages/frontend/src/workers/draw-blurhash.ts b/packages/frontend/src/workers/draw-blurhash.ts
index 22de6cd3a8..6e49f6bf66 100644
--- a/packages/frontend/src/workers/draw-blurhash.ts
+++ b/packages/frontend/src/workers/draw-blurhash.ts
@@ -18,5 +18,5 @@ onmessage = (event) => {
 
 	render(event.data.hash, canvas);
 	const bitmap = canvas.transferToImageBitmap();
-	postMessage({ id: event.data.id, bitmap });
+	postMessage({ id: event.data.id, bitmap }, [bitmap]);
 };