diff --git a/perception/object_merger/launch/object_association_merger.launch.xml b/perception/object_merger/launch/object_association_merger.launch.xml
index 41bc5257a0129..e41e4112124a8 100644
--- a/perception/object_merger/launch/object_association_merger.launch.xml
+++ b/perception/object_merger/launch/object_association_merger.launch.xml
@@ -15,7 +15,7 @@
     <param from="$(var distance_threshold_list_path)"/>
     <param name="priority_mode" value="$(var priority_mode)"/>
     <param name="remove_overlapped_unknown_objects" value="false"/>
-    <param name="generalized_iou_threshold" value="-0.6"/>
+    <param name="generalized_iou_threshold" value="-0.1"/>
     <param name="precision_threshold_to_judge_overlapped" value="0.4"/>
   </node>
 </launch>