README.md in strong_migrations-0.1.6 vs README.md in strong_migrations-0.1.7

@@ -91,10 +91,16 @@
 ### Removing a column
 
 Tell ActiveRecord to ignore the column from its cache.
 
 ```ruby
-class User
+# For Rails 5+
+class User < ActiveRecord::Base
+  self.ignored_columns = %w(some_column)
+end
+
+# For Rails < 5
+class User < ActiveRecord::Base
   def self.columns
     super.reject { |c| c.name == "some_column" }
   end
 end
 ```