diff --git a/launch/jhu_needle.launch.py b/launch/jhu_needle.launch.py
index cdb3a82..7c84263 100644
--- a/launch/jhu_needle.launch.py
+++ b/launch/jhu_needle.launch.py
@@ -39,7 +39,7 @@ def generate_launch_description():
     )
     arg_params = DeclareLaunchArgument(
         'needleParamFile',
-        default_value = "3CH-4AA-0005_needle_params_2022-01-26_Jig-Calibration_best_weights.json",
+        default_value = "3CH-4AA-0005_needle_params_2022-01-26_Jig-Calibration_best_weights-tuned.json",
         description = "The shape-sensing needle parameter json file" 
     )                                 
     arg_interrIP = DeclareLaunchArgument(