diff --git a/Gemfile b/Gemfile
index 3f0e551f9a97887476f30cc0b34fb74821f5d76a..0fd14f54770895f17543fcc6e8bd892984c60eea 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 source 'https://rubygems.org'
 
 gem 'jekyll', '~> 4'