diff --git a/packages/backend/src/core/QueueService.ts b/packages/backend/src/core/QueueService.ts
index c1664312c4b2..667257086611 100644
--- a/packages/backend/src/core/QueueService.ts
+++ b/packages/backend/src/core/QueueService.ts
@@ -7,7 +7,7 @@ import { randomUUID } from 'node:crypto';
 import { Inject, Injectable } from '@nestjs/common';
 import type { IActivity } from '@/core/activitypub/type.js';
 import type { MiDriveFile } from '@/models/DriveFile.js';
-import type { MiWebhook, WebhookEventType } from '@/models/Webhook.js';
+import type { MiWebhook, WebhookEventTypes } from '@/models/Webhook.js';
 import type { MiSystemWebhook, SystemWebhookEventType } from '@/models/SystemWebhook.js';
 import type { Config } from '@/config.js';
 import { DI } from '@/di-symbols.js';
@@ -463,7 +463,7 @@ export class QueueService {
 	@bindThis
 	public userWebhookDeliver(
 		webhook: MiWebhook,
-		type: WebhookEventType,
+		type: WebhookEventTypes,
 		content: unknown,
 		opts?: { attempts?: number },
 	) {
diff --git a/packages/backend/src/models/Webhook.ts b/packages/backend/src/models/Webhook.ts
index 26cba2e59a5b..6b054e45f37e 100644
--- a/packages/backend/src/models/Webhook.ts
+++ b/packages/backend/src/models/Webhook.ts
@@ -8,7 +8,6 @@ import { id } from './util/id.js';
 import { MiUser } from './User.js';
 
 export const webhookEventTypes = ['mention', 'unfollow', 'follow', 'followed', 'note', 'reply', 'renote', 'reaction'] as const;
-export type WebhookEventType = (typeof webhookEventTypes)[number] | `note@${string}`; // TODO: remove this line later
 export type WebhookEventTypes = typeof webhookEventTypes[number] | `note@${string}`;
 
 @Entity('webhook')
@@ -39,7 +38,7 @@ export class MiWebhook {
 	@Column('varchar', {
 		length: 128, array: true, default: '{}',
 	})
-	public on: WebhookEventType[];
+	public on: WebhookEventTypes[];
 
 	@Column('varchar', {
 		length: 1024,
diff --git a/packages/backend/src/server/api/endpoints/i/webhooks/create.ts b/packages/backend/src/server/api/endpoints/i/webhooks/create.ts
index f0b445c6238c..4f19cce3b9a7 100644
--- a/packages/backend/src/server/api/endpoints/i/webhooks/create.ts
+++ b/packages/backend/src/server/api/endpoints/i/webhooks/create.ts
@@ -7,7 +7,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { IdService } from '@/core/IdService.js';
 import type { WebhooksRepository } from '@/models/_.js';
-import { webhookEventTypes, WebhookEventType } from '@/models/Webhook.js';
+import { webhookEventTypes, WebhookEventTypes } from '@/models/Webhook.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
@@ -112,7 +112,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				name: ps.name,
 				url: ps.url,
 				secret: ps.secret,
-				on: ps.on as WebhookEventType[],
+				on: ps.on as WebhookEventTypes[],
 			});
 
 			this.globalEventService.publishInternalEvent('webhookCreated', webhook);
diff --git a/packages/backend/src/server/api/endpoints/i/webhooks/update.ts b/packages/backend/src/server/api/endpoints/i/webhooks/update.ts
index 93b34e9d42cc..816c9ce9f3d5 100644
--- a/packages/backend/src/server/api/endpoints/i/webhooks/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/webhooks/update.ts
@@ -6,7 +6,7 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import type { WebhooksRepository } from '@/models/_.js';
-import { webhookEventTypes, WebhookEventType } from '@/models/Webhook.js';
+import { webhookEventTypes, WebhookEventTypes } from '@/models/Webhook.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
@@ -83,7 +83,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				name: ps.name,
 				url: ps.url,
 				secret: ps.secret === null ? '' : ps.secret,
-				on: ps.on as WebhookEventType[],
+				on: ps.on as WebhookEventTypes[],
 				active: ps.active,
 			});