diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000000000000000000000000000000000000..fa75df15632305f9badb9a7ac0028e4b2ef4d221
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gemspec
diff --git a/lib/jekyll-pandoc-multiple-formats.rb b/lib/jekyll-pandoc-multiple-formats.rb
index acea7e648af1249a6cf3fe119f9ec466eab3133b..aba5313906c01bb8a706bfdf88862b87e9d380a8 100644
--- a/lib/jekyll-pandoc-multiple-formats.rb
+++ b/lib/jekyll-pandoc-multiple-formats.rb
@@ -1,4 +1,5 @@
 require 'open3'
+require 'jekyll-pandoc-multiple-formats/version'
 
 module Jekyll