diff --git a/Gemfile b/Gemfile
index 3be9c3c..76ad049 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,7 @@
-source "https://rubygems.org"
-gemspec
+source 'https://rubygems.org'
+
+gem 'jekyll', '~> 4.2'
+
+group :jekyll_plugins do
+  gem 'jekyll-timeago', '~> 0.13.1'
+end