diff --git a/train.py b/train.py
index 6c518b99..9d2b1a48 100644
--- a/train.py
+++ b/train.py
@@ -10,7 +10,7 @@ parser.add_argument('-epochs', type=int, default=100, help='number of epochs')
 parser.add_argument('-batch_size', type=int, default=16, help='size of each image batch')
 parser.add_argument('-data_config_path', type=str, default='cfg/coco.data', help='data config file path')
 parser.add_argument('-cfg', type=str, default='cfg/yolov3.cfg', help='cfg file path')
-parser.add_argument('-img_size', type=int, default=32 * 19, help='size of each image dimension')
+parser.add_argument('-img_size', type=int, default=32 * 13, help='size of each image dimension')
 parser.add_argument('-resume', default=False, help='resume training flag')
 opt = parser.parse_args()
 print(opt)