diff --git a/.rubocop.yml b/.rubocop.yml
index 4684ef06db7..64ec766b223 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -28,6 +28,7 @@ AllCops:
     - 'Vagrantfile'
     - 'vendor/**/*'
     - 'lib/json_ld/*' # Generated files
+    - 'lib/mastodon/migration_helpers.rb' # Vendored from GitLab
     - 'lib/templates/**/*'
 
 # Reason: Prefer Hashes without extreme indentation
diff --git a/lib/mastodon/migration_helpers.rb b/lib/mastodon/migration_helpers.rb
index c382b5fbd5b..a92a8767ce3 100644
--- a/lib/mastodon/migration_helpers.rb
+++ b/lib/mastodon/migration_helpers.rb
@@ -37,7 +37,6 @@
 
 # This is bad form, but there are enough differences that it's impractical to do
 # otherwise:
-# rubocop:disable all
 
 module Mastodon
   module MigrationHelpers
@@ -989,5 +988,3 @@ into similar problems in the future (e.g. when new tables are created).
     end
   end
 end
-
-# rubocop:enable all