diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index d5e02cc..6c67224 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,6 @@
 $:.unshift File.expand_path("../lib",__FILE__)
 require "valid_email2"
+require "debug"
 
 # Include and configure  benchmark
 require 'rspec-benchmark'
diff --git a/valid_email2.gemspec b/valid_email2.gemspec
index b9e67a7..1ad0bb7 100644
--- a/valid_email2.gemspec
+++ b/valid_email2.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rspec", "~> 3.5"
   spec.add_development_dependency "rspec-benchmark", "~> 0.6"
   spec.add_development_dependency "net-smtp"
-  spec.add_development_dependency "pry"
+  spec.add_development_dependency "debug"
   spec.add_runtime_dependency "mail", "~> 2.5"
   spec.add_runtime_dependency "activemodel", ">= 6.0"
 end