README.md in seo_cache-0.6.0 vs README.md in seo_cache-0.7.0

@@ -80,9 +80,15 @@
     
 ```ruby
 SeoCache.log_missed_cache = true
 ```
  
+Domains to whitelist (authorize only domains which contains these hosts):
+
+```ruby
+SeoCache.whitelist_hosts = []
+```
+
 URLs to blacklist:
 
 ```ruby
 SeoCache.blacklist_params = %w[^/assets/.* ^/admin.*]
 ```