diff --git a/README.md b/README.md
index 09b966d..9b18b89 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ Simulation related:
 
 For ROS Melodic:
 ```
-sudo apt-get install ros-melodic-controller-interface  ros-melodic-gazebo-ros-control ros-melodic-joint-state-controller ros-melodic-effort-controllers ros-melodic-joint-trajectory-controller
+sudo apt-get install ros-melodic-controller-interface  ros-melodic-gazebo-ros-control ros-melodic-joint-state-controller ros-melodic-effort-controllers ros-melodic-joint-trajectory-controller ros-melodic-robot-state-publisher
 ```
 For ROS Kinetic:
 ```
@@ -104,4 +104,4 @@ roslaunch unitree_gazebo z1.launch
 ```
 
 After launching the gazebo simulation, you can start to control the z1 robot by z1_sdk.  
-see [z1_documentation](https://dev-z1.unitree.com)
\ No newline at end of file
+see [z1_documentation](https://dev-z1.unitree.com)