diff --git a/packages/backend/src/core/MetaService.ts b/packages/backend/src/core/MetaService.ts
index f9619861bb..42ce4de432 100644
--- a/packages/backend/src/core/MetaService.ts
+++ b/packages/backend/src/core/MetaService.ts
@@ -16,7 +16,7 @@ import type { OnApplicationShutdown } from '@nestjs/common';
 @Injectable()
 export class MetaService implements OnApplicationShutdown {
 	private cache: MiMeta | undefined;
-	private intervalId: NodeJS.Timer;
+	private intervalId: NodeJS.Timeout;
 
 	constructor(
 		@Inject(DI.redisForSub)
diff --git a/packages/backend/src/core/chart/ChartManagementService.ts b/packages/backend/src/core/chart/ChartManagementService.ts
index 6b626d3980..f751a68cb4 100644
--- a/packages/backend/src/core/chart/ChartManagementService.ts
+++ b/packages/backend/src/core/chart/ChartManagementService.ts
@@ -23,7 +23,7 @@ import type { OnApplicationShutdown } from '@nestjs/common';
 @Injectable()
 export class ChartManagementService implements OnApplicationShutdown {
 	private charts;
-	private saveIntervalId: NodeJS.Timer;
+	private saveIntervalId: NodeJS.Timeout;
 
 	constructor(
 		private federationChart: FederationChart,
diff --git a/packages/backend/src/daemons/JanitorService.ts b/packages/backend/src/daemons/JanitorService.ts
index 6f5e5a7f3b..63c44e874f 100644
--- a/packages/backend/src/daemons/JanitorService.ts
+++ b/packages/backend/src/daemons/JanitorService.ts
@@ -14,7 +14,7 @@ const interval = 30 * 60 * 1000;
 
 @Injectable()
 export class JanitorService implements OnApplicationShutdown {
-	private intervalId: NodeJS.Timer;
+	private intervalId: NodeJS.Timeout;
 
 	constructor(
 		@Inject(DI.attestationChallengesRepository)
diff --git a/packages/backend/src/daemons/QueueStatsService.ts b/packages/backend/src/daemons/QueueStatsService.ts
index dc9482f022..5edc0f45ab 100644
--- a/packages/backend/src/daemons/QueueStatsService.ts
+++ b/packages/backend/src/daemons/QueueStatsService.ts
@@ -19,7 +19,7 @@ const interval = 10000;
 
 @Injectable()
 export class QueueStatsService implements OnApplicationShutdown {
-	private intervalId: NodeJS.Timer;
+	private intervalId: NodeJS.Timeout;
 
 	constructor(
 		@Inject(DI.config)
diff --git a/packages/backend/src/misc/cache.ts b/packages/backend/src/misc/cache.ts
index 046d4d6c2f..c235871931 100644
--- a/packages/backend/src/misc/cache.ts
+++ b/packages/backend/src/misc/cache.ts
@@ -193,7 +193,7 @@ function nothingToDo<T, V = T>(value: T): V {
 export class MemoryKVCache<T, V = T> {
 	public cache: Map<string, { date: number; value: V; }>;
 	private lifetime: number;
-	private gcIntervalHandle: NodeJS.Timer;
+	private gcIntervalHandle: NodeJS.Timeout;
 	private toMapConverter: (value: T) => V;
 	private fromMapConverter: (cached: V) => T | undefined;
 
diff --git a/packages/backend/src/server/api/ApiCallService.ts b/packages/backend/src/server/api/ApiCallService.ts
index 5d5a8f3706..b90c8a5199 100644
--- a/packages/backend/src/server/api/ApiCallService.ts
+++ b/packages/backend/src/server/api/ApiCallService.ts
@@ -35,7 +35,7 @@ const accessDenied = {
 export class ApiCallService implements OnApplicationShutdown {
 	private logger: Logger;
 	private userIpHistories: Map<MiUser['id'], Set<string>>;
-	private userIpHistoriesClearIntervalId: NodeJS.Timer;
+	private userIpHistoriesClearIntervalId: NodeJS.Timeout;
 
 	constructor(
 		@Inject(DI.userIpsRepository)
diff --git a/packages/backend/src/server/api/stream/channels/user-list.ts b/packages/backend/src/server/api/stream/channels/user-list.ts
index 557b934722..f7001e41cd 100644
--- a/packages/backend/src/server/api/stream/channels/user-list.ts
+++ b/packages/backend/src/server/api/stream/channels/user-list.ts
@@ -19,7 +19,7 @@ class UserListChannel extends Channel {
 	public static requireCredential = false;
 	private listId: string;
 	public listUsers: MiUser['id'][] = [];
-	private listUsersClock: NodeJS.Timer;
+	private listUsersClock: NodeJS.Timeout;
 
 	constructor(
 		private userListsRepository: UserListsRepository,