diff --git a/lib/request.js b/lib/request.js
index f6643a7a..81d9b67c 100644
--- a/lib/request.js
+++ b/lib/request.js
@@ -3,6 +3,20 @@ import {Request, fetch} from 'cross-fetch';
 import {parse as parseContentType} from 'content-type';
 import {HafasError} from './errors.js';
 
+const proxyAddress = typeof process !== 'undefined' && (process.env.HTTPS_PROXY || process.env.HTTP_PROXY) || null;
+
+let getAgent = () => undefined;
+
+if (proxyAddress) {
+	import('https-proxy-agent').then(a => {
+		const agent = new a.default.HttpsProxyAgent(proxyAddress, {
+			keepAlive: true,
+			keepAliveMsecs: 10 * 1000, // 10s
+		});
+		getAgent = () => agent;
+	});
+} 
+
 const randomBytesHexString = length => [...Array(length)].map(() => Math.floor(Math.random() * 16)
 	.toString(16))
 	.join('');
@@ -66,6 +80,7 @@ const request = async (ctx, userAgent, reqData) => {
 	const rawReqBody = profile.transformReqBody(ctx, reqData.body);
 
 	const reqOptions = profile.transformReq(ctx, {
+		agent: getAgent(),
 		keepalive: true,
 		method: reqData.method,
 		// todo: CORS? referrer policy?