diff --git a/src/queue/processors/http/deliver.ts b/src/queue/processors/http/deliver.ts
index e06866da4..75e46559d 100644
--- a/src/queue/processors/http/deliver.ts
+++ b/src/queue/processors/http/deliver.ts
@@ -7,6 +7,11 @@ export default async (job: bq.Job, done: any): Promise<void> => {
 		await request(job.data.user, job.data.to, job.data.content);
 		done();
 	} catch (res) {
+		if (!res.hasOwnProperty('statusCode')) {
+			console.warn(`deliver failed (unknown): ${res}`);
+			return done();
+		}
+
 		if (res.statusCode == null) return done();
 		if (res.statusCode >= 400 && res.statusCode < 500) {
 			// HTTPステータスコード4xxはクライアントエラーであり、それはつまり