diff --git a/lib/rubocop/cop/rails/content_tag.rb b/lib/rubocop/cop/rails/content_tag.rb
index 2ae4afe085..8a36dc7a71 100644
--- a/lib/rubocop/cop/rails/content_tag.rb
+++ b/lib/rubocop/cop/rails/content_tag.rb
@@ -7,7 +7,7 @@ module Rails
       #
       # NOTE: Allow `tag` when the first argument is a variable because
       # `tag(name)` is simpler rather than `tag.public_send(name)`.
-      # And this cop will be renamed to something like `LegacyTag` in the future. (e.g. RuboCop Rails 2.0)
+      # And this cop will be renamed to something like `LegacyTag` in the future. (e.g. RuboCop Rails 3.0)
       #
       # @example
       #  # bad