diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..af77bc8
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in digest-keccak.gemspec
+gemspec