diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..bdb81e6
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gem 'json'
+gem 'hash-joiner'
+gem 'open-uri-cached'
diff --git a/readme.md b/readme.md
index cfb734d..8b9bd3e 100644
--- a/readme.md
+++ b/readme.md
@@ -2,6 +2,13 @@
 
 Add this file to `_plugins` in the root of your Jekyll site.
 
+Add dependencies from Gemfile to your jekyll site's Gemfile
+
+# Run
+`bundle install`
+`jekyll build`
+`jekyll serve`
+
 # Configure
 
 This plugin reads settings from the `_config.yml` file. Add settings as attributes or an array of attributes for multiple files.