diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ea5b44c..bfd05e4 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,5 @@
 require "active_model"
 require "active_support"
-require "debug"
 
 RSpec::Matchers.define :have_errors_on_email do
   match do |user|
diff --git a/validates_email_format_of.gemspec b/validates_email_format_of.gemspec
index 033ae91..c66b3f7 100644
--- a/validates_email_format_of.gemspec
+++ b/validates_email_format_of.gemspec
@@ -25,5 +25,4 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec"
   s.add_development_dependency "standard"
   s.add_development_dependency "appraisal"
-  s.add_development_dependency "byebug", ">= 1.0.0"
 end