diff --git a/bin/video2x.py b/bin/video2x.py
index 96d1e1e..a6d442a 100644
--- a/bin/video2x.py
+++ b/bin/video2x.py
@@ -76,16 +76,16 @@ def process_arguments():
     upscaler_options = parser.add_argument_group('Upscaler Options')
     upscaler_options.add_argument('-m', '--method', help='Upscaling method', action='store', default='gpu', choices=['cpu', 'gpu', 'cudnn'], required=True)
     upscaler_options.add_argument('-d', '--driver', help='Waifu2x driver', action='store', default='waifu2x_caffe', choices=['waifu2x_caffe', 'waifu2x_converter'])
-    upscaler_options.add_argument('-y', '--model_dir', help='Folder containing model JSON files', action='store', default=None)
+    upscaler_options.add_argument('-y', '--model_dir', help='Folder containing model JSON files', action='store')
     upscaler_options.add_argument('-t', '--threads', help='Number of threads to use for upscaling', action='store', type=int, default=5)
     upscaler_options.add_argument('-c', '--config', help='Video2X config file location', action='store', default='{}\\video2x.json'.format(os.path.dirname(os.path.abspath(__file__))))
-    upscaler_options.add_argument('-b', '--batch', help='Enable batch mode (select all default values to questions)', action='store_true', default=False)
+    upscaler_options.add_argument('-b', '--batch', help='Enable batch mode (select all default values to questions)', action='store_true')
 
     # scaling options
     scaling_options = parser.add_argument_group('Scaling Options')
-    scaling_options.add_argument('--width', help='Output video width', action='store', type=int, default=False)
-    scaling_options.add_argument('--height', help='Output video height', action='store', type=int, default=False)
-    scaling_options.add_argument('-r', '--ratio', help='Scaling ratio', action='store', type=float, default=False)
+    scaling_options.add_argument('--width', help='Output video width', action='store', type=int)
+    scaling_options.add_argument('--height', help='Output video height', action='store', type=int)
+    scaling_options.add_argument('-r', '--ratio', help='Scaling ratio', action='store', type=float)
 
     # parse arguments
     return parser.parse_args()