diff --git a/lib/storage/image-download-preparation.ts b/lib/storage/image-download-preparation.ts
index 716d29b45..af049357e 100644
--- a/lib/storage/image-download-preparation.ts
+++ b/lib/storage/image-download-preparation.ts
@@ -38,7 +38,7 @@ export async function prepareImageArchiveDownload(id: string) {
     phase = "store";
     const url = source.buffer.equals(asset.bytes) && asset.contentType === "image/png"
       ? task.targetUrl
-      : (await uploadFile(`canvas-download-${randomUUID()}.${asset.filename.split(".").pop() || "png"}`, Uint8Array.from(asset.bytes).buffer)).url;
+      : (await uploadFile(`canvas-download-${randomUUID()}.${asset.filename.split(".").pop() || "png"}`, Uint8Array.from(asset.bytes).buffer, { preferQiniuForm: true })).url;
     await saveImageDownloadAsset(id, { status: "ready", url, bytes: asset.bytes.length,
       contentType: asset.contentType, preparedAt: new Date().toISOString() });
     await cacheImageBytes(`source::${url}`, { buffer: asset.bytes, contentType: asset.contentType });