README.md in petrarca-0.4.6 vs README.md in petrarca-0.4.7

- old
+ new

@@ -10,10 +10,10 @@
 All functions support both ISBN-13 and ISBN-10.
 
 All ranges of registration groups and registrants are supported.
 Those depends on 'RangeMessage.xml' file, downloaded from [International ISBN Agency](https://www.isbn-international.org/range_file_generation).
 
-NOTE: Updated range files to latest version on July 5, 2021.
+NOTE: Updated range files to latest version on August 11, 2021.
 
 ## Installation
 
 Add this line to your application's Gemfile:
 