diff --git a/README.md b/README.md index 642d46a..f997b30 100644 --- a/README.md +++ b/README.md @@ -8,7 +8,9 @@ A lightweight plugin that logs impressions per action or manually per model ------------------------------------------------------------------------------------------------------------------------------ NOTE: If you are upgrading from a version prior to 0.4.0, you will need to run this migration after the upgrade: + https://github.com/charlotte-ruby/impressionist/blob/master/upgrade_migrations/version_0_4_0.rb + If you don't run this migration you will receive this error: Unknown attribute : referrer