diff --git a/Gemfile b/Gemfile
index 73bf208..332a615 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,5 +5,6 @@ ruby File.read(".ruby-version").strip
 source "https://rubygems.org"
 
 gem "caliber", "~> 0.35"
+gem "debug", "~> 1.8"
 gem "git-lint", "~> 6.0"
 gem "rake", "~> 13.0"