diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..5168758
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+ruby '~> 2.7'
+
+gem "jekyll", '~> 4.2'