diff --git a/FAST_LIO/config/velodyne.yaml b/FAST_LIO/config/velodyne.yaml
index 00a60477..db677a82 100644
--- a/FAST_LIO/config/velodyne.yaml
+++ b/FAST_LIO/config/velodyne.yaml
@@ -23,9 +23,9 @@
             det_range:     200.0
             extrinsic_est_en:  false      # true: enable the online estimation of IMU-LiDAR extrinsic,
             extrinsic_T: [ 0, 0, 0.28]
-            extrinsic_R: [ 1, 0, 0, 
-                           0, 1, 0, 
-                           0, 0, 1]
+            extrinsic_R: [ 1.0, 0.0, 0.0, 
+                           0.0, 1.0, 0.0, 
+                           0.0, 0.0, 1.0]
 
         publish:
             path_en: true                # true: publish Path
@@ -42,4 +42,4 @@
         
         traj_save:
             traj_save_en: false
-            traj_file_path: "/root/ros2_ws/src/FAST_LIO/traj/trajectory.txt" # when you use docker, you should enter the absolute path of in docker container
\ No newline at end of file
+            traj_file_path: "/root/ros2_ws/src/FAST_LIO/traj/trajectory.txt" # when you use docker, you should enter the absolute path of in docker container