diff --git a/db/fixtures/development/99_common_metrics.rb b/db/fixtures/development/99_common_metrics.rb
index db8e894e762..1f39c0ce5a0 100644
--- a/db/fixtures/development/99_common_metrics.rb
+++ b/db/fixtures/development/99_common_metrics.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
-require_relative '../importers/common_metrics_importer.rb'
+require Rails.root.join('db/importers/common_metrics_importer.rb')
 
 ::Importers::CommonMetricsImporter.new.execute
diff --git a/db/fixtures/production/999_common_metrics.rb b/db/fixtures/production/999_common_metrics.rb
index db8e894e762..1f39c0ce5a0 100644
--- a/db/fixtures/production/999_common_metrics.rb
+++ b/db/fixtures/production/999_common_metrics.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
-require_relative '../importers/common_metrics_importer.rb'
+require Rails.root.join('db/importers/common_metrics_importer.rb')
 
 ::Importers::CommonMetricsImporter.new.execute
diff --git a/db/migrate/20180831164909_import_common_metrics.rb b/db/migrate/20180831164909_import_common_metrics.rb
index cb7cfe3c1da..72658c09b8e 100644
--- a/db/migrate/20180831164909_import_common_metrics.rb
+++ b/db/migrate/20180831164909_import_common_metrics.rb
@@ -3,7 +3,7 @@
 class ImportCommonMetrics < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 
-  require_relative '../importers/common_metrics_importer.rb'
+  require Rails.root.join('db/importers/common_metrics_importer.rb')
 
   DOWNTIME = false
 
diff --git a/doc/development/prometheus_metrics.md b/doc/development/prometheus_metrics.md
index 488d344b8cc..6977815a979 100644
--- a/doc/development/prometheus_metrics.md
+++ b/doc/development/prometheus_metrics.md
@@ -31,7 +31,9 @@ After you add or change existing _common_ metric you have to create a new databa
 
 ```ruby
 class ImportCommonMetrics < ActiveRecord::Migration
-  require_relative '../importers/common_metrics_importer.rb'
+  include Gitlab::Database::MigrationHelpers
+
+  require Rails.root.join('db/importers/common_metrics_importer.rb')
 
   DOWNTIME = false