diff --git a/src/loaders/ApiBasedShuttleRepositoryLoader.ts b/src/loaders/ApiBasedShuttleRepositoryLoader.ts
index cf31c25..dc2ba1f 100644
--- a/src/loaders/ApiBasedShuttleRepositoryLoader.ts
+++ b/src/loaders/ApiBasedShuttleRepositoryLoader.ts
@@ -15,10 +15,10 @@ export class ApiResponseError extends Error {
  * which inherit from `IEntityWithId`.
  */
 export class ApiBasedShuttleRepositoryLoader implements ShuttleRepositoryLoader {
-  systemId = "263";
   baseUrl = "https://passiogo.com/mapGetData.php";
 
   constructor(
+    public systemId: string,
     public repository: ShuttleGetterSetterRepository,
   ) {
   }
diff --git a/src/loaders/TimedApiBasedShuttleRepositoryLoader.ts b/src/loaders/TimedApiBasedShuttleRepositoryLoader.ts
index e036373..91847a5 100644
--- a/src/loaders/TimedApiBasedShuttleRepositoryLoader.ts
+++ b/src/loaders/TimedApiBasedShuttleRepositoryLoader.ts
@@ -22,9 +22,10 @@ export class TimedApiBasedShuttleRepositoryLoader extends ApiBasedShuttleReposit
   readonly timeout = 10000;
 
   constructor(
+    public systemId: string,
     repository: ShuttleGetterSetterRepository,
   ) {
-    super(repository);
+    super(systemId, repository);
     this.startFetchDataAndUpdate = this.startFetchDataAndUpdate.bind(this);
   }
 
diff --git a/test/loaders/ApiBasedShuttleRepositoryLoaderTests.test.ts b/test/loaders/ApiBasedShuttleRepositoryLoaderTests.test.ts
index ba40f6f..706387f 100644
--- a/test/loaders/ApiBasedShuttleRepositoryLoaderTests.test.ts
+++ b/test/loaders/ApiBasedShuttleRepositoryLoaderTests.test.ts
@@ -26,7 +26,7 @@ describe("ApiBasedRepositoryLoader", () => {
   let loader: ApiBasedShuttleRepositoryLoader;
 
   beforeEach(() => {
-    loader = new ApiBasedShuttleRepositoryLoader(new UnoptimizedInMemoryShuttleRepository());
+    loader = new ApiBasedShuttleRepositoryLoader("1", new UnoptimizedInMemoryShuttleRepository());
     resetGlobalFetchMockJson();
   });
 
diff --git a/test/loaders/TimedApiBasedShuttleRepositoryLoaderTests.test.ts b/test/loaders/TimedApiBasedShuttleRepositoryLoaderTests.test.ts
index f8548a3..f6c27f5 100644
--- a/test/loaders/TimedApiBasedShuttleRepositoryLoaderTests.test.ts
+++ b/test/loaders/TimedApiBasedShuttleRepositoryLoaderTests.test.ts
@@ -15,7 +15,7 @@ describe("TimedApiBasedRepositoryLoader", () => {
   beforeEach(() => {
     resetGlobalFetchMockJson();
 
-    loader = new TimedApiBasedShuttleRepositoryLoader(new UnoptimizedInMemoryShuttleRepository());
+    loader = new TimedApiBasedShuttleRepositoryLoader("1", new UnoptimizedInMemoryShuttleRepository());
 
     spies = {
       fetchAndUpdateSystemData: jest.spyOn(loader, 'fetchAndUpdateSystemData'),