diff --git a/installation/catkin_ws/src/cp_gazebo/ex_config.json b/installation/catkin_ws/src/cp_gazebo/ex_config.json
index 167fc4c..ee1ebd0 100644
--- a/installation/catkin_ws/src/cp_gazebo/ex_config.json
+++ b/installation/catkin_ws/src/cp_gazebo/ex_config.json
@@ -6,6 +6,6 @@
 
     "initial_voltage" : 166,
     "initial_obstacle" : true,
-    "initial_obstacle_location" : {"x":5, "y":10},
+    "initial_obstacle_location" : {"x":5.0, "y":10.0},
     "sensor_perturbation" : {"x" : 0, "y": 0, "z" : 0, "p" : 0, "w" : 0, "r" : 0}
 }