diff --git a/lib/tasks/mastodon.rake b/lib/tasks/mastodon.rake
index 4761b2919..15b423745 100644
--- a/lib/tasks/mastodon.rake
+++ b/lib/tasks/mastodon.rake
@@ -82,6 +82,22 @@ namespace :mastodon do
     end
   end
 
+  namespace :settings do
+    desc 'Open registrations on this instance'
+    task open_registrations: :environment do
+      setting = Setting.where(var: 'open_registrations').first
+      setting.value = true
+      setting.save
+    end
+
+    desc 'Close registrations on this instance'
+    task close_registrations: :environment do
+      setting = Setting.where(var: 'open_registrations').first
+      setting.value = false
+      setting.save
+    end
+  end
+
   namespace :maintenance do
     desc 'Update counter caches'
     task update_counter_caches: :environment do