Forwarded: https://gitlab.com/gitlab-org/gitlab/-/issues/354323

--- a/Gemfile
+++ b/Gemfile
@@ -17,6 +17,9 @@
 # Supported DBs
 gem 'pg', '~> 1.1'
 
+# Background migrations/fix vulnerabilities
+gem 'parser', '~> 3.0'
+
 gem 'rugged', '~> 1.2'
 gem 'grape-path-helpers', '~> 1.7'