diff --git a/library/Math.py b/library/Math.py
index 1efc151..5bb6d19 100644
--- a/library/Math.py
+++ b/library/Math.py
@@ -160,7 +160,7 @@ def calc_location(dimension, proj_matrix, box_2d, alpha, theta_ray):
         M_array = [Ma, Mb, Mc, Md]
 
         # create A, b
-        A = np.zeros([4,3], dtype=np.float)
+        A = np.zeros([4,3], dtype=float)
         b = np.zeros([4,1])
 
         indicies = [0,1,0,1]