diff --git a/launch/wpb_ai_nav_test.launch b/launch/wpb_ai_nav_test.launch
index 0a8b945..5143b22 100644
--- a/launch/wpb_ai_nav_test.launch
+++ b/launch/wpb_ai_nav_test.launch
@@ -46,7 +46,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"/>
diff --git a/launch/wpb_home_nav_remote.launch b/launch/wpb_home_nav_remote.launch
index 1d0826f..e76285c 100644
--- a/launch/wpb_home_nav_remote.launch
+++ b/launch/wpb_home_nav_remote.launch
@@ -46,7 +46,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"/>
diff --git a/launch/wpb_home_nav_test.launch b/launch/wpb_home_nav_test.launch
index 0285325..2301e43 100644
--- a/launch/wpb_home_nav_test.launch
+++ b/launch/wpb_home_nav_test.launch
@@ -46,7 +46,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"/>
diff --git a/launch/wpb_mani_nav_test.launch b/launch/wpb_mani_nav_test.launch
index 7ec2ea4..2303322 100644
--- a/launch/wpb_mani_nav_test.launch
+++ b/launch/wpb_mani_nav_test.launch
@@ -46,7 +46,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="robot_state_publisher" pkg="robot_state_publisher" type="robot_state_publisher"/>
diff --git a/launch/wpr1_nav_test.launch b/launch/wpr1_nav_test.launch
index b71f71a..0733c73 100644
--- a/launch/wpr1_nav_test.launch
+++ b/launch/wpr1_nav_test.launch
@@ -9,7 +9,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="rviz" pkg="rviz" type="rviz" args="-d $(arg rvizconfig)" required="true" />
diff --git a/launch/wpv3_nav_test.launch b/launch/wpv3_nav_test.launch
index 4b5cd1b..451865f 100644
--- a/launch/wpv3_nav_test.launch
+++ b/launch/wpv3_nav_test.launch
@@ -9,7 +9,7 @@
   <arg name="gui" default="true" />
   <arg name="rvizconfig" default="$(find waterplus_map_tools)/rviz/nav.rviz" />
 
-  <param name="robot_description" command="$(find xacro)/xacro.py $(arg model)" />
+  <param name="robot_description" command="$(find xacro)/xacro $(arg model)" />
   <param name="use_gui" value="$(arg gui)"/>
 
   <node name="rviz" pkg="rviz" type="rviz" args="-d $(arg rvizconfig)" required="true" />