diff --git a/.config/example.yml b/.config/example.yml
index cbb9c0bd51..b996a83fb5 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -82,9 +82,8 @@ redis:
   #pass: example-pass
   #prefix: example-prefix
   #db: 1
-  # Extra ioredis options
-  #extra:
-  # username: example-username
+  # You can specify more ioredis options...
+  #username: example-username
 
 #redisForPubsub:
 #  host: localhost
@@ -93,9 +92,8 @@ redis:
 #  #pass: example-pass
 #  #prefix: example-prefix
 #  #db: 1
-#  # Extra ioredis options
-#  #extra:
-#  # username: example-username
+#  # You can specify more ioredis options...
+#  #username: example-username
 
 #redisForJobQueue:
 #  host: localhost
@@ -104,9 +102,8 @@ redis:
 #  #pass: example-pass
 #  #prefix: example-prefix
 #  #db: 1
-#  # Extra ioredis options
-#  #extra:
-#  # username: example-username
+#  # You can specify more ioredis options...
+#  #username: example-username
 
 #   ┌───────────────────────────┐
 #───┘ MeiliSearch configuration └─────────────────────────────
diff --git a/packages/backend/check_connect.js b/packages/backend/check_connect.js
index bea8abb82c..da78c8ec7c 100644
--- a/packages/backend/check_connect.js
+++ b/packages/backend/check_connect.js
@@ -2,15 +2,7 @@ import Redis from 'ioredis';
 import { loadConfig } from './built/config.js';
 
 const config = loadConfig();
-const redis = new Redis({
-	port: config.redis.port,
-	host: config.redis.host,
-	family: config.redis.family == null ? 0 : config.redis.family,
-	password: config.redis.pass,
-	keyPrefix: `${config.redis.prefix}:`,
-	db: config.redis.db ?? 0,
-	...(config.redis.extra ?? {}),
-});
+const redis = new Redis(config.redis);
 
 redis.on('connect', () => redis.disconnect());
 redis.on('error', (e) => {
diff --git a/packages/backend/src/GlobalModule.ts b/packages/backend/src/GlobalModule.ts
index 4b1de080d9..4caf4c3e96 100644
--- a/packages/backend/src/GlobalModule.ts
+++ b/packages/backend/src/GlobalModule.ts
@@ -41,15 +41,7 @@ const $meilisearch: Provider = {
 const $redis: Provider = {
 	provide: DI.redis,
 	useFactory: (config: Config) => {
-		return new Redis.Redis({
-			port: config.redis.port,
-			host: config.redis.host,
-			family: config.redis.family == null ? 0 : config.redis.family,
-			password: config.redis.pass,
-			keyPrefix: `${config.redis.prefix}:`,
-			db: config.redis.db ?? 0,
-			...(config.redis.extra ?? {}),
-		});
+		return new Redis.Redis(config.redis);
 	},
 	inject: [DI.config],
 };
@@ -57,15 +49,7 @@ const $redis: Provider = {
 const $redisForPub: Provider = {
 	provide: DI.redisForPub,
 	useFactory: (config: Config) => {
-		const redis = new Redis.Redis({
-			port: config.redisForPubsub.port,
-			host: config.redisForPubsub.host,
-			family: config.redisForPubsub.family == null ? 0 : config.redisForPubsub.family,
-			password: config.redisForPubsub.pass,
-			keyPrefix: `${config.redisForPubsub.prefix}:`,
-			db: config.redisForPubsub.db ?? 0,
-			...(config.redisForPubsub.extra ?? {}),
-		});
+		const redis = new Redis.Redis(config.redisForPubsub);
 		return redis;
 	},
 	inject: [DI.config],
@@ -74,15 +58,7 @@ const $redisForPub: Provider = {
 const $redisForSub: Provider = {
 	provide: DI.redisForSub,
 	useFactory: (config: Config) => {
-		const redis = new Redis.Redis({
-			port: config.redisForPubsub.port,
-			host: config.redisForPubsub.host,
-			family: config.redisForPubsub.family == null ? 0 : config.redisForPubsub.family,
-			password: config.redisForPubsub.pass,
-			keyPrefix: `${config.redisForPubsub.prefix}:`,
-			db: config.redisForPubsub.db ?? 0,
-			...(config.redisForPubsub.extra ?? {}),
-		});
+		const redis = new Redis.Redis(config.redisForPubsub);
 		redis.subscribe(config.host);
 		return redis;
 	},
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index d8a8ffbb2a..3d7475fd83 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -8,6 +8,15 @@ import { dirname, resolve } from 'node:path';
 import * as yaml from 'js-yaml';
 import type { RedisOptions } from 'ioredis';
 
+type RedisOptionsSource = Partial<RedisOptions> & {
+	host: string;
+	port: number;
+	family?: number;
+	pass: string;
+	db?: number;
+	prefix?: string;
+};
+
 /**
  * ユーザーが設定する必要のある情報
  */
@@ -36,33 +45,9 @@ export type Source = {
 		user: string;
 		pass: string;
 	}[];
-	redis: {
-		host: string;
-		port: number;
-		family?: number;
-		pass: string;
-		db?: number;
-		prefix?: string;
-		extra?: RedisOptions;
-	};
-	redisForPubsub?: {
-		host: string;
-		port: number;
-		family?: number;
-		pass: string;
-		db?: number;
-		prefix?: string;
-		extra?: RedisOptions;
-	};
-	redisForJobQueue?: {
-		host: string;
-		port: number;
-		family?: number;
-		pass: string;
-		db?: number;
-		prefix?: string;
-		extra?: RedisOptions;
-	};
+	redis: RedisOptionsSource;
+	redisForPubsub?: RedisOptionsSource;
+	redisForJobQueue?: RedisOptionsSource;
 	meilisearch?: {
 		host: string;
 		port: string;
@@ -123,8 +108,9 @@ export type Mixin = {
 	mediaProxy: string;
 	externalMediaProxyEnabled: boolean;
 	videoThumbnailGenerator: string | null;
-	redisForPubsub: NonNullable<Source['redisForPubsub']>;
-	redisForJobQueue: NonNullable<Source['redisForJobQueue']>;
+	redis: RedisOptions;
+	redisForPubsub: RedisOptions;
+	redisForJobQueue: RedisOptions;
 };
 
 export type Config = Source & Mixin;
@@ -186,9 +172,9 @@ export function loadConfig() {
 		config.videoThumbnailGenerator.endsWith('/') ? config.videoThumbnailGenerator.substring(0, config.videoThumbnailGenerator.length - 1) : config.videoThumbnailGenerator
 		: null;
 
-	if (!config.redis.prefix) config.redis.prefix = mixin.host;
-	if (config.redisForPubsub == null) config.redisForPubsub = config.redis;
-	if (config.redisForJobQueue == null) config.redisForJobQueue = config.redis;
+	mixin.redis = convertRedisOptions(config.redis, mixin.host);
+	mixin.redisForPubsub = config.redisForPubsub ? convertRedisOptions(config.redisForPubsub, mixin.host) : mixin.redis;
+	mixin.redisForJobQueue = config.redisForJobQueue ? convertRedisOptions(config.redisForJobQueue, mixin.host) : mixin.redis;
 
 	return Object.assign(config, mixin);
 }
@@ -200,3 +186,12 @@ function tryCreateUrl(url: string) {
 		throw new Error(`url="${url}" is not a valid URL.`);
 	}
 }
+
+function convertRedisOptions(options: RedisOptionsSource, host: string): RedisOptions {
+	return {
+		...options,
+		family: options.family == null ? 0 : options.family,
+		keyPrefix: `${options.prefix ?? host}:`,
+		db: options.db ?? 0,
+	};
+}
diff --git a/packages/backend/src/queue/const.ts b/packages/backend/src/queue/const.ts
index 4b34daadf3..18ad542c87 100644
--- a/packages/backend/src/queue/const.ts
+++ b/packages/backend/src/queue/const.ts
@@ -14,14 +14,7 @@ export const QUEUE = {
 
 export function baseQueueOptions(config: Config, queueName: typeof QUEUE[keyof typeof QUEUE]): Bull.QueueOptions {
 	return {
-		connection: {
-			port: config.redisForJobQueue.port,
-			host: config.redisForJobQueue.host,
-			family: config.redisForJobQueue.family == null ? 0 : config.redisForJobQueue.family,
-			password: config.redisForJobQueue.pass,
-			db: config.redisForJobQueue.db ?? 0,
-			...(config.redisForJobQueue.extra ?? {}),
-		},
+		connection: config.redisForJobQueue,
 		prefix: config.redisForJobQueue.prefix ? `${config.redisForJobQueue.prefix}:queue:${queueName}` : `queue:${queueName}`,
 	};
 }