diff --git a/lib/spannable_grid.dart b/lib/spannable_grid.dart
index 49c3134..121248f 100644
--- a/lib/spannable_grid.dart
+++ b/lib/spannable_grid.dart
@@ -150,6 +150,7 @@ class _SpannableGridState extends State<SpannableGrid> {
 
   @override
   Widget build(BuildContext context) {
+    _updateCellsAndChildren();
     return AspectRatio(
       aspectRatio: widget.columns / widget.rows,
       child: CustomMultiChildLayout(