diff --git a/lib/src/layer/group_layer.dart b/lib/src/layer/group_layer.dart
index 68b79761a..30a3ea3bd 100644
--- a/lib/src/layer/group_layer.dart
+++ b/lib/src/layer/group_layer.dart
@@ -7,9 +7,9 @@ class GroupLayerOptions extends LayerOptions {
   List<LayerOptions> group = <LayerOptions>[];
 
   GroupLayerOptions({
-    required Key key,
-    required this.group,
-    required Stream<Null> rebuild,
+    Key? key,
+    this.group = const [],
+    Stream<Null>? rebuild,
   }) : super(key: key, rebuild: rebuild);
 }