diff --git a/autoware_launch/config/perception/object_recognition/tracking/multi_object_tracker/data_association_matrix.param.yaml b/autoware_launch/config/perception/object_recognition/tracking/multi_object_tracker/data_association_matrix.param.yaml
index ccb4552936..8713a794af 100644
--- a/autoware_launch/config/perception/object_recognition/tracking/multi_object_tracker/data_association_matrix.param.yaml
+++ b/autoware_launch/config/perception/object_recognition/tracking/multi_object_tracker/data_association_matrix.param.yaml
@@ -35,7 +35,7 @@
            2.00, 10000.00, 10000.00, 10000.00, 10000.00,      1.50,      1.50,     1.00]   #PEDESTRIAN
     min_area_matrix:
       #UNKNOWN, CAR,   TRUCK, BUS,    TRAILER,  MOTORBIKE, BICYCLE, PEDESTRIAN
-      [ 1.000,  0.000, 0.000,  0.000, 0.000,    0.000,     0.000,   0.000,      #UNKNOWN
+      [ 0.001,  0.000, 0.000,  0.000, 0.000,    0.000,     0.000,   0.000,      #UNKNOWN
         3.600,  3.600, 6.000, 10.000, 10.000,   0.000,     0.000,   0.000,      #CAR
         6.000,  3.600, 6.000, 10.000, 10.000,   0.000,     0.000,   0.000,      #TRUCK
        10.000,  3.600, 6.000, 10.000, 10.000,   0.000,     0.000,   0.000,      #BUS