diff --git a/lib/api_handler.dart b/lib/api_handler.dart
index 4e9e5cd..323ac81 100644
--- a/lib/api_handler.dart
+++ b/lib/api_handler.dart
@@ -125,7 +125,7 @@ class ApiHandler {
   }) async {
     String urlPath = '/api/fahrinfo/latest/multiDepartureBoard';
     String stationListString = stationList
-        .reduce((value, element) => value + '|' + element)
+        .reduce((value, element) => '$value|$element')
         .replaceAll(' ', '%20'); // reform for URL
 
     Uri url = Uri.https(baseUrl, urlPath, {