diff --git a/autoware_launch/config/perception/obstacle_segmentation/ground_segmentation/ground_segmentation.param.yaml b/autoware_launch/config/perception/obstacle_segmentation/ground_segmentation/ground_segmentation.param.yaml
index 0237671ccf..cc7c52ed47 100644
--- a/autoware_launch/config/perception/obstacle_segmentation/ground_segmentation/ground_segmentation.param.yaml
+++ b/autoware_launch/config/perception/obstacle_segmentation/ground_segmentation/ground_segmentation.param.yaml
@@ -24,7 +24,7 @@
         use_virtual_ground_point: True
         split_height_distance: 0.2
         non_ground_height_threshold: 0.20
-        grid_size_m: 0.1
+        grid_size_m: 0.5
         grid_mode_switch_radius: 20.0
         gnd_grid_buffer_size: 4
         detection_range_z_max: 2.5