README.md in shoelace-rails-0.3.0 vs README.md in shoelace-rails-0.4.0

@@ -1,8 +1,13 @@
 # Shoelace Rails
 
 The `shoelace-rails` gem adds useful helper methods for [Shoelace.style](https://shoelace.style), the design system.
 
+## Compatibility with Shoelace
+
+* **For Shoelace version >= 2.0.0-beta.88, use the gem version `0.4.0` or above**.
+* For Shoelace version <= 2.0.0-beta.87, use the gem version `0.3.0`.
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby