README.md in intro-0.4.0 vs README.md in intro-0.4.1

@@ -93,16 +93,19 @@
 app/javascript/packs/intro/custom.js
 ```
 
 Change them for your need.
 
-Last, import custom packs javascript into `intro_tag` like this:
+Last, enable `custom_assets` in `config/initializers/intro.rb` like this:
 
 ```
-<%= intro_tags do %>
-  <%= javascript_pack_tag('intro/custom') %>
-<% end %>
+# config/initializers/intro.rb
+
+# override intro tour styles
+self.custom_assets = true # or 'intro/custom'
 ```
+
+It will bring intro/custom assets into `intro_tags`
 
 ### Configuring intro
 
 see `config/initializers/intro.rb` for detail configuration.
 
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