diff --git a/demo/app/models/user.rb b/demo/app/models/user.rb
index f5f44b4..be96f5f 100644
--- a/demo/app/models/user.rb
+++ b/demo/app/models/user.rb
@@ -1,3 +1,5 @@
 class User < ActiveRecord::Base
-  has_rich_text :rich_content
+  if Rails.version >= "6.0"
+    has_rich_text :rich_content
+  end
 end