diff --git a/packages/flutter_timeline/example/lib/apps/navigator/app.dart b/packages/flutter_timeline/example/lib/apps/navigator/app.dart
index aed79d5..434d595 100644
--- a/packages/flutter_timeline/example/lib/apps/navigator/app.dart
+++ b/packages/flutter_timeline/example/lib/apps/navigator/app.dart
@@ -31,7 +31,8 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
-  var timelineService = TimelineService(postService: LocalTimelinePostService());
+  var timelineService =
+      TimelineService(postService: LocalTimelinePostService());
   var timelineOptions = options;
 
   @override
@@ -64,10 +65,10 @@ class _MyHomePageState extends State<MyHomePage> {
       ),
       body: SafeArea(
         child: timeLineNavigatorUserStory(
-            getConfig(
+            configuration: getConfig(
               timelineService,
             ),
-            context),
+            context: context),
       ),
     );
   }
diff --git a/packages/flutter_timeline_firebase/lib/src/service/firebase_post_service.dart b/packages/flutter_timeline_firebase/lib/src/service/firebase_post_service.dart
index 8215e71..d01ae83 100644
--- a/packages/flutter_timeline_firebase/lib/src/service/firebase_post_service.dart
+++ b/packages/flutter_timeline_firebase/lib/src/service/firebase_post_service.dart
@@ -18,13 +18,13 @@ class FirebaseTimelinePostService extends TimelinePostService
   FirebaseTimelinePostService({
     required TimelineUserService userService,
     FirebaseApp? app,
-    options = const FirebaseTimelineOptions(),
+    FirebaseTimelineOptions? options,
   }) {
     var appInstance = app ?? Firebase.app();
     _db = FirebaseFirestore.instanceFor(app: appInstance);
     _storage = FirebaseStorage.instanceFor(app: appInstance);
     _userService = userService;
-    _options = options;
+    _options = options ?? const FirebaseTimelineOptions();
   }
 
   late FirebaseFirestore _db;