diff --git a/railties/lib/rails/generators/rails/app/templates/config/initializers/new_framework_defaults_7_0.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/initializers/new_framework_defaults_7_0.rb.tt
index c1694171a8..bd82ea0a07 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/initializers/new_framework_defaults_7_0.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/initializers/new_framework_defaults_7_0.rb.tt
@@ -46,11 +46,13 @@
 #   "-vf select=eq(n\,0)+eq(key\,1)+gt(scene\,0.015),loop=loop=-1:size=2,trim=start_frame=1 -frames:v 1 -f image2"
 
 # If you're upgrading and haven't set `cookies_serializer` previously, your cookie serializer
-# was `:marshal`. Continue to use that for backward-compatibility with old cookies.
-# If you have configured the serializer elsewhere, you can remove this.
+# was `:marshal`. Convert all cookies to JSON, using the `:hybrid` formatter.
 #
-# To convert all cookies to JSON, use the `:hybrid` formatter.
 # If you're confident all your cookies are JSON formatted, you can switch to the `:json` formatter.
 #
+# Continue to use `:marshal` for backward-compatibility with old cookies.
+#
+# If you have configured the serializer elsewhere, you can remove this.
+#
 # See https://guides.rubyonrails.org/action_controller_overview.html#cookies for more information.
-# Rails.application.config.action_dispatch.cookies_serializer = :marshal
+# Rails.application.config.action_dispatch.cookies_serializer = :hybrid