diff --git a/stretch_core/nodes/command_groups.py b/stretch_core/nodes/command_groups.py
index c7ec7be..b7f23a8 100644
--- a/stretch_core/nodes/command_groups.py
+++ b/stretch_core/nodes/command_groups.py
@@ -139,9 +139,9 @@ class WristYawCommandGroup(SimpleCommandGroup):
 
 class GripperCommandGroup(SimpleCommandGroup):
     def __init__(self, range_robotis=None, node=None):
+        self.gripper_conversion = GripperConversion()
         SimpleCommandGroup.__init__(self, 'joint_gripper_finger_left', range_robotis, acceptable_joint_error=1.0, node=node)
         self.gripper_joint_names = ['joint_gripper_finger_left', 'joint_gripper_finger_right', 'gripper_aperture']
-        self.gripper_conversion = GripperConversion()
         self.update_joint_range(range_robotis)
 
     def update_joint_range(self, joint_range, node=None):
diff --git a/stretch_core/nodes/joint_trajectory_server.py b/stretch_core/nodes/joint_trajectory_server.py
index 8235cf2..7a195fa 100644
--- a/stretch_core/nodes/joint_trajectory_server.py
+++ b/stretch_core/nodes/joint_trajectory_server.py
@@ -1,5 +1,7 @@
 #! /usr/bin/env python3
 
+import importlib
+
 import rospy
 import actionlib
 from control_msgs.msg import FollowJointTrajectoryAction