diff --git a/Gemfile b/Gemfile
index 6801eb2c..79862851 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,5 +15,5 @@ gem 'twitter-text', '~> 3.1'
 gem "wikicloth", "=0.8.3"
 gem 'asciidoctor', '~> 2.0', '>= 2.0.21'
 gem 'rake', '~> 13.1'
-gem 'pandoc-ruby', '~> 2.1', '>= 2.1.10'
+gem 'paru'
 
diff --git a/lib/github/markups.rb b/lib/github/markups.rb
index 20702af3..1ab4030f 100644
--- a/lib/github/markups.rb
+++ b/lib/github/markups.rb
@@ -1,7 +1,7 @@
 require "github/markup/markdown"
 require "github/markup/rdoc"
 require "shellwords"
-require 'pandoc-ruby'
+require "paru/pandoc"
 
 markup_impl(::GitHub::Markups::MARKUP_MARKDOWN, ::GitHub::Markup::Markdown.new)
 
@@ -49,7 +49,11 @@
 end
 
 markup(::GitHub::Markups::MARKUP_RST, :rst, /re?st(\.txt)?/, ["reStructuredText"]) do |filename, content, options: {}|
-  PandocRuby.new(content, from: :rst).to_html
+  output = Paru::Pandoc.new do
+    from "rst"
+    to "html"
+  end << content
+  puts output
 end
 
 command(::GitHub::Markups::MARKUP_POD6, :pod62html, /pod6/, ["Pod 6"], "pod6")