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-rw-r--r--guides/source/security.md2
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/security.md b/guides/source/security.md
index d0d7e12b0a..882daa9806 100644
--- a/guides/source/security.md
+++ b/guides/source/security.md
@@ -189,7 +189,7 @@ class Session < ApplicationRecord
end
```
-The section about session fixation introduced the problem of maintained sessions. An attacker maintaining a session every five minutes can keep the session alive forever, although you are expiring sessions. A simple solution for this would be to add a created_at column to the sessions table. Now you can delete sessions that were created a long time ago. Use this line in the sweep method above:
+The section about session fixation introduced the problem of maintained sessions. An attacker maintaining a session every five minutes can keep the session alive forever, although you are expiring sessions. A simple solution for this would be to add a `created_at` column to the sessions table. Now you can delete sessions that were created a long time ago. Use this line in the sweep method above:
```ruby
delete_all "updated_at < '#{time.ago.to_s(:db)}' OR