diff --git a/README.md b/README.md
index 430bbc2..cb37579 100755
--- a/README.md
+++ b/README.md
@@ -39,8 +39,7 @@ Add it in you FlutterMap and configure it using `MarkerClusterGroupLayerOptions`
         ),
         MarkerClusterLayerOptions(
           maxClusterRadius: 120,
-          height: 40,
-          width: 40,
+          size: Size(40, 40),
           fitBoundsOptions: FitBoundsOptions(
             padding: EdgeInsets.all(50),
           ),
@@ -63,4 +62,4 @@ Add it in you FlutterMap and configure it using `MarkerClusterGroupLayerOptions`
 
 ### Run the example
 
-See the `example/` folder for a working example app.
\ No newline at end of file
+See the `example/` folder for a working example app.