diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000000..68adeedb48
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# gem "rails"
+gem 'danger', '~> 5.5', '>= 5.5.3'
+gem 'danger-swiftlint'