diff --git a/ppgan/utils/options.py b/ppgan/utils/options.py
index e87477af0ca867e1d53d0d64ae9249e9ca2f1a1d..32572c4032168d0398cc4284a507187d072ea20e 100644
--- a/ppgan/utils/options.py
+++ b/ppgan/utils/options.py
@@ -45,10 +45,10 @@ def parse_args():
                         default=False,
                         help='skip validation during training')
     # config options
-    parser.add_argument('opts',
-                        help='See config for all options',
-                        default=None,
-                        nargs=argparse.REMAINDER)
+    parser.add_argument("-o", 
+                        "--opt", 
+                        nargs='+', 
+                        help="set configuration options")
 
     #for inference
     parser.add_argument("--source_path",
diff --git a/tools/main.py b/tools/main.py
index 7d40c11c5b4b93ae9cd4678909efc8b4526dedde..b7e2b82607401d87fa6b2309528e776d2f0f2f92 100644
--- a/tools/main.py
+++ b/tools/main.py
@@ -51,6 +51,6 @@ def main(args, cfg):
 
 if __name__ == '__main__':
     args = parse_args()
-    cfg = get_config(args.config_file)
+    cfg = get_config(args.config_file, args.opt)
 
     main(args, cfg)