README.md in colissimo_label-0.10.0 vs README.md in colissimo_label-0.11.0

@@ -136,9 +136,15 @@
           email:        'Email of the addressee'
         }
       ).perform
 ```
 
+You can add the following option to require the signature:
+
+```
+with_signature: true
+```
+
 For a national address and delivered to a relay point:
 
 ```ruby
 parcel_number = ColissimoLabel::GenerateLabel.new(
         'label_filename', # Name of the file generated