diff --git a/autonomous_vehicle.py b/autonomous_vehicle.py
index a40f933..9178b08 100755
--- a/autonomous_vehicle.py
+++ b/autonomous_vehicle.py
@@ -7,7 +7,8 @@
 from loss_functions import LossFunctions
 from scipy import optimize
 import pygame as pg
-from scipy.interpolate import spline
+#from scipy.interpolate import spline
+from scipy.interpolate import make_interp_spline #updated by Yi
 from scipy import stats
 import time
 import matplotlib.pyplot as plt
@@ -1062,4 +1063,4 @@ def dynamic(self, action_self): # Dynamic of cubic polynomial on velocity
          A[np.tril_indices(N, 0)] = 1
          predict_result_traj = np.matmul(A, predict_result_vel) + state_0
 
-         return predict_result_traj
\ No newline at end of file
+         return predict_result_traj