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diff --git a/lib/banzai/filter/markdown_engines/redcarpet.rb b/lib/banzai/filter/markdown_engines/redcarpet.rb
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+# `Redcarpet` markdown engine for GitLab's Banzai markdown filter.
+# This module is used in Banzai::Filter::MarkdownFilter.
+# Used gem is `redcarpet` which is a ruby library for markdown processing.
+# Homepage: https://github.com/vmg/redcarpet
+
+module Banzai
+  module Filter
+    module MarkdownEngines
+      class Redcarpet
+        OPTIONS = {
+          fenced_code_blocks:  true,
+          footnotes:           true,
+          lax_spacing:         true,
+          no_intra_emphasis:   true,
+          space_after_headers: true,
+          strikethrough:       true,
+          superscript:         true,
+          tables:              true
+        }.freeze
+
+        def initialize
+          html_renderer = Banzai::Renderer::Redcarpet::HTML.new
+          @renderer = ::Redcarpet::Markdown.new(html_renderer, OPTIONS)
+        end
+
+        def render(text)
+          @renderer.render(text)
+        end
+      end
+    end
+  end
+end