diff --git a/lib/tasks/mastodon.rake b/lib/tasks/mastodon.rake
index e1e2dd8194f..40a0e567e38 100644
--- a/lib/tasks/mastodon.rake
+++ b/lib/tasks/mastodon.rake
@@ -356,6 +356,16 @@ namespace :mastodon do
 
       prompt.say "\n"
 
+      ip_retention_period_days = prompt.ask('How long should we store IP addresses in the database, for moderation purposes? (in days)') do |q|
+        q.required true
+        q.default 31
+        q.convert :int
+      end
+
+      env['IP_RETENTION_PERIOD'] = (ip_retention_period_days * 86400)
+
+      prompt.say "\n"
+
       loop do
         if prompt.yes?('Do you want to send e-mails from localhost?', default: false)
           env['SMTP_SERVER'] = 'localhost'