diff --git a/aip_x1_1_launch/config/ground_segmentation/ground_segmentation.param.yaml b/aip_x1_1_launch/config/ground_segmentation/ground_segmentation.param.yaml
index 979648dd..f46812f1 100644
--- a/aip_x1_1_launch/config/ground_segmentation/ground_segmentation.param.yaml
+++ b/aip_x1_1_launch/config/ground_segmentation/ground_segmentation.param.yaml
@@ -13,7 +13,7 @@
         max_x: 150.0
         min_y: -70.0
         max_y: 70.0
-        margin_max_z: 2.5  # to extend the crop box max_z from vehicle_height
+        margin_max_z: 0.0  # to extend the crop box max_z from vehicle_height
         margin_min_z: -0.5 # to extend the crop box min_z from ground
         negative: False