diff --git a/find-leg.js b/find-leg.js
index c0b81d4..eed8b1e 100644
--- a/find-leg.js
+++ b/find-leg.js
@@ -89,6 +89,7 @@ const createFindLeg = (A, B) => {
 		}
 
 		const findStop = createFindStop(A, B)
+		// todo: customisable concurrency? or even across all `findLegInAnotherHafas` calls?
 		const [firstStopB, lastStopB] = await Promise.all([
 			findStop(firstStopA),
 			findStop(lastStopA)
diff --git a/find-stop.js b/find-stop.js
index c78c4d7..ffe2b88 100644
--- a/find-stop.js
+++ b/find-stop.js
@@ -46,7 +46,7 @@ const createFindStop = (A, B) => {
 	}
 
 	const findStopById = async (stopA) => {
-		debug('findStopById', stopA.id, stopA.ids, stopA.name)
+		debug('findStopById', stopA.id, stopA.ids || {}, stopA.name)
 		const idsA = stopA.ids || {}
 		const idA = (
 			idsA[endpNameB] ||
diff --git a/package.json b/package.json
index 8a0e31e..a232c16 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "find-hafas-data-in-another-hafas",
 	"description": "Find data from one HAFAS endpoint in another one.",
-	"version": "4.2.0",
+	"version": "4.3.0",
 	"main": "index.js",
 	"files": [
 		"index.js",
diff --git a/readme.md b/readme.md
index dc54075..3a8bf84 100644
--- a/readme.md
+++ b/readme.md
@@ -5,8 +5,8 @@
 [![npm version](https://img.shields.io/npm/v/find-hafas-data-in-another-hafas.svg)](https://www.npmjs.com/package/find-hafas-data-in-another-hafas)
 [![build status](https://api.travis-ci.org/derhuerst/find-hafas-data-in-another-hafas.svg?branch=master)](https://travis-ci.org/derhuerst/find-hafas-data-in-another-hafas)
 ![ISC-licensed](https://img.shields.io/github/license/derhuerst/find-hafas-data-in-another-hafas.svg)
-[![chat with me on Gitter](https://img.shields.io/badge/chat%20with%20me-on%20gitter-512e92.svg)](https://gitter.im/derhuerst)
-[![support me on Patreon](https://img.shields.io/badge/support%20me-on%20patreon-fa7664.svg)](https://patreon.com/derhuerst)
+[![support me via GitHub Sponsors](https://img.shields.io/badge/support%20me-donate-fa7664.svg)](https://github.com/sponsors/derhuerst)
+[![chat with me on Twitter](https://img.shields.io/badge/chat%20with%20me-on%20Twitter-1da1f2.svg)](https://twitter.com/derhuerst)
 
 Public transport providers in Europe often have data about vehicles run by other companies, but almost always it is outdated or imprecise. Consider these examples: