diff --git a/packages/backend/src/queue/index.ts b/packages/backend/src/queue/index.ts
index 24c0e1f23..94055e9c5 100644
--- a/packages/backend/src/queue/index.ts
+++ b/packages/backend/src/queue/index.ts
@@ -1,4 +1,4 @@
-import * as httpSignature from 'http-signature';
+import httpSignature from 'http-signature';
 
 import config from '@/config/index.js';
 import { envOption } from '../env.js';
diff --git a/packages/backend/src/queue/types.ts b/packages/backend/src/queue/types.ts
index 7363c2c72..de5f5d139 100644
--- a/packages/backend/src/queue/types.ts
+++ b/packages/backend/src/queue/types.ts
@@ -1,7 +1,7 @@
 import { DriveFile } from '@/models/entities/drive-file.js';
 import { User } from '@/models/entities/user.js';
 import { IActivity } from '@/remote/activitypub/type.js';
-import * as httpSignature from 'http-signature';
+import httpSignature from 'http-signature';
 
 export type DeliverJobData = {
 	/** Actor */
diff --git a/packages/backend/src/server/activitypub.ts b/packages/backend/src/server/activitypub.ts
index 45eec3d26..21be0a251 100644
--- a/packages/backend/src/server/activitypub.ts
+++ b/packages/backend/src/server/activitypub.ts
@@ -1,6 +1,6 @@
 import Router from '@koa/router';
 import json from 'koa-json-body';
-import * as httpSignature from 'http-signature';
+import httpSignature from 'http-signature';
 
 import { renderActivity } from '@/remote/activitypub/renderer/index.js';
 import renderNote from '@/remote/activitypub/renderer/note.js';