diff --git a/packages/backend/src/core/HttpRequestService.ts b/packages/backend/src/core/HttpRequestService.ts
index 3a70ac77f..cd859d002 100644
--- a/packages/backend/src/core/HttpRequestService.ts
+++ b/packages/backend/src/core/HttpRequestService.ts
@@ -134,9 +134,34 @@ export class UndiciFetcher {
 		return res;
 	}
 
+	@bindThis
+	public async request(
+		url: string | URL,
+		options: { dispatcher?: undici.Dispatcher } & Omit<undici.Dispatcher.RequestOptions, 'origin' | 'path' | 'method'> & Partial<Pick<undici.Dispatcher.RequestOptions, 'method'>> = {},
+		privateOptions: { noOkError?: boolean; bypassProxy?: boolean; } = { noOkError: false, bypassProxy: false },
+	): Promise<undici.Dispatcher.ResponseData> {
+		const res = await undici.request(url, {
+			dispatcher: this.getAgentByUrl(new URL(url), privateOptions.bypassProxy),
+			...options,
+			headers: {
+				'user-agent': this.userAgent ?? '',
+				...(options.headers ?? {}),
+			},
+		}).catch((err) => {
+			this.logger?.error(`fetch error to ${typeof url === 'string' ? url : url.href}`, err);
+			throw new StatusError('Resource Unreachable', 500, 'Resource Unreachable');
+		});
+
+		if (res.statusCode >= 400) {
+			throw new StatusError(`${res.statusCode}`, res.statusCode, '');
+		}
+
+		return res;
+	}
+
 	@bindThis
 	public async getJson<T extends unknown>(url: string, accept = 'application/json, */*', headers?: Record<string, string>): Promise<T> {
-		const res = await this.fetch(
+		const { body } = await this.request( 
 			url,
 			{
 				headers: Object.assign({
@@ -145,12 +170,12 @@ export class UndiciFetcher {
 			},
 		);
 
-		return await res.json() as T;
+		return await body.json() as T;
 	}
 
 	@bindThis
 	public async getHtml(url: string, accept = 'text/html, */*', headers?: Record<string, string>): Promise<string> {
-		const res = await this.fetch(
+		const { body } = await this.request(
 			url,
 			{
 				headers: Object.assign({
@@ -159,7 +184,7 @@ export class UndiciFetcher {
 			},
 		);
 
-		return await res.text();
+		return await body.text();
 	}
 }
 
@@ -167,6 +192,7 @@ export class UndiciFetcher {
 export class HttpRequestService {
 	public defaultFetcher: UndiciFetcher;
 	public fetch: UndiciFetcher['fetch'];
+	public request: UndiciFetcher['request'];
 	public getHtml: UndiciFetcher['getHtml'];
 	public defaultJsonFetcher: UndiciFetcher;
 	public getJson: UndiciFetcher['getJson'];
@@ -221,11 +247,12 @@ export class HttpRequestService {
 			},
 		};
 
-		this.maxSockets = Math.max(64, this.config.deliverJobConcurrency ?? 128);
+		this.maxSockets = Math.max(64, ((this.config.deliverJobConcurrency ?? 128) / (this.config.clusterLimit ?? 1)));
 
 		this.defaultFetcher = this.createFetcher({}, {}, this.logger);
 
 		this.fetch = this.defaultFetcher.fetch;
+		this.request = this.defaultFetcher.request;
 		this.getHtml = this.defaultFetcher.getHtml;
 
 		this.defaultJsonFetcher = this.createFetcher({
diff --git a/packages/backend/src/core/activitypub/ApRequestService.ts b/packages/backend/src/core/activitypub/ApRequestService.ts
index fd7319702..db87475c4 100644
--- a/packages/backend/src/core/activitypub/ApRequestService.ts
+++ b/packages/backend/src/core/activitypub/ApRequestService.ts
@@ -9,10 +9,12 @@ import { HttpRequestService, UndiciFetcher } from '@/core/HttpRequestService.js'
 import { LoggerService } from '@/core/LoggerService.js';
 import { bindThis } from '@/decorators.js';
 import type Logger from '@/logger.js';
+import type { Dispatcher } from 'undici';
+import { DevNull } from '@/misc/dev-null.js';
 
 type Request = {
 	url: string;
-	method: string;
+	method: Dispatcher.HttpMethod;
 	headers: Record<string, string>;
 };
 
@@ -163,7 +165,7 @@ export class ApRequestService {
 			},
 		});
 
-		await this.undiciFetcher.fetch(
+		const response = await this.undiciFetcher.request(
 			url,
 			{
 				method: req.request.method,
@@ -171,6 +173,7 @@ export class ApRequestService {
 				body,
 			},
 		);
+		response.body.pipe(new DevNull());
 	}
 
 	/**
diff --git a/packages/backend/src/misc/dev-null.ts b/packages/backend/src/misc/dev-null.ts
new file mode 100644
index 000000000..38b9d8266
--- /dev/null
+++ b/packages/backend/src/misc/dev-null.ts
@@ -0,0 +1,11 @@
+import { Writable, WritableOptions } from "node:stream";
+
+export class DevNull extends Writable implements NodeJS.WritableStream {
+    constructor(opts?: WritableOptions) {
+        super(opts);
+    }
+
+    _write (chunk: any, encoding: BufferEncoding, cb: (err?: Error | null) => void) {
+        setImmediate(cb);
+    }
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index cdbbd3b82..3fdaf1449 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -3801,7 +3801,7 @@ packages:
   /axios/0.24.0:
     resolution: {integrity: sha512-Q6cWsys88HoPgAaFAVUb0WpPk0O8iTeisR9IMqy9G8AbO4NlpVknrnQS03zzF9PGAWgO3cgletO3VjV/P7VztA==}
     dependencies:
-      follow-redirects: 1.15.2
+      follow-redirects: 1.15.2_debug@4.3.4
     transitivePeerDependencies:
       - debug
     dev: false
@@ -6973,16 +6973,6 @@ packages:
       readable-stream: 2.3.7
     dev: false
 
-  /follow-redirects/1.15.2:
-    resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
-    engines: {node: '>=4.0'}
-    peerDependencies:
-      debug: '*'
-    peerDependenciesMeta:
-      debug:
-        optional: true
-    dev: false
-
   /follow-redirects/1.15.2_debug@4.3.4:
     resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
     engines: {node: '>=4.0'}
@@ -6993,7 +6983,6 @@ packages:
         optional: true
     dependencies:
       debug: 4.3.4
-    dev: true
 
   /for-each/0.3.3:
     resolution: {integrity: sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==}