diff --git a/lib/gitlab/markdown/reference_filter.rb b/lib/gitlab/markdown/reference_filter.rb
index a4303d96bef..be4d26af0fc 100644
--- a/lib/gitlab/markdown/reference_filter.rb
+++ b/lib/gitlab/markdown/reference_filter.rb
@@ -1,5 +1,5 @@
 require 'active_support/core_ext/string/output_safety'
-require 'html/pipeline'
+require 'html/pipeline/filter'
 
 module Gitlab
   module Markdown