diff --git a/chessboard_finder.py b/chessboard_finder.py
index 7b62147..e8ec180 100755
--- a/chessboard_finder.py
+++ b/chessboard_finder.py
@@ -193,7 +193,7 @@ def findChessboardCorners(img_arr_gray, noise_threshold = 8000):
       sub_corners = np.array([
         sub_seqs_y[j][0]-corners[0]-dy, sub_seqs_x[i][0]-corners[1]-dx,
         sub_seqs_y[j][-1]-corners[0]+dy, sub_seqs_x[i][-1]-corners[1]+dx],
-        dtype=np.int)
+        dtype=int)
 
       # Generate crop candidate, nearest pixel is fine for correlation check
       sub_img = gray_img_crop.crop(sub_corners).resize((64,64))