diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..5e688c2
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1 @@
+gem 'RedCloth'
diff --git a/init.rb b/init.rb
index 8911f9b..41add50 100644
--- a/init.rb
+++ b/init.rb
@@ -38,7 +38,7 @@ else
   end
 end
 
-require 'redcloth3'
+require 'RedCloth'
 Redmine::Plugin.register :redmine_wiki_notes do
   name 'Redmine Wiki Notes plugin'
   author 'Daniel Seifert'