diff --git a/normalisename.py b/normalisename.py
index 7bc7e81..243b92c 100755
--- a/normalisename.py
+++ b/normalisename.py
@@ -5,18 +5,26 @@ from os.path import basename, dirname
 from os.path import join as joinpath
 from argparse import ArgumentParser
 
+
 parser = ArgumentParser(description='Eliminate funky stuff from filenames.')
 parser.add_argument('--separator', '-s', type=str, nargs='?', default='_',
                     help='Set separator to use (to replace spaces with).')
+parser.add_argument('--allow', '-a', type=str, nargs='?', action='append',
+                    help='Specify a special character to allow (it will not be removed).')
+parser.add_argument('--whitelist', '-w', type=str,
+                    help='Overwrite default whitelist (format: whitespace separated string).')
 parser.add_argument('files', type=str, nargs='+',
                     help='File(s) to normalise the name of (relative or absolute path).')
-
 args = parser.parse_args()
 
 
 # special characters that will not be removed
 whitelist = {' ', '.', '-'}
+if args.whitelist: whitelist = set(args.whitelist.split())
+
 whitelist.add(args.separator)
+if args.allow: whitelist = whitelist.union(set(args.allow))
+
 
 for path in args.files:
     dir = dirname(path)