diff --git a/app/logical/danbooru_maintenance.rb b/app/logical/danbooru_maintenance.rb
index c0e349a1b..7d6ff61a7 100644
--- a/app/logical/danbooru_maintenance.rb
+++ b/app/logical/danbooru_maintenance.rb
@@ -17,6 +17,7 @@ module DanbooruMaintenance
     safely { TagChangeRequestPruner.warn_all }
     safely { TagChangeRequestPruner.reject_all }
     safely { Ban.prune! }
+    safely { ModerationReport.prune! }
     safely { CuratedPoolUpdater.update_pool! }
     safely { ActiveRecord::Base.connection.execute("vacuum analyze") unless Rails.env.test? }
   end
diff --git a/app/models/moderation_report.rb b/app/models/moderation_report.rb
index fb0a1aa61..da987a448 100644
--- a/app/models/moderation_report.rb
+++ b/app/models/moderation_report.rb
@@ -54,4 +54,8 @@ class ModerationReport < ApplicationRecord
 
     q.apply_default_order(params)
   end
+
+  def self.prune!
+    where("created_at < ?", 1.week.ago).delete_all
+  end
 end