diff --git a/create_send_rails.gemspec b/create_send_rails.gemspec
index a651faa..6068ce6 100644
--- a/create_send_rails.gemspec
+++ b/create_send_rails.gemspec
@@ -18,16 +18,17 @@ Gem::Specification.new do |s|
   s.test_files    = %w{spec}
   s.require_paths = %w{lib}
 
+  s.add_dependency 'activesupport', '>= 3.0.0'
   s.add_dependency 'actionmailer', '>= 3.0.0'
-  s.add_dependency 'createsend', '4.1.0'
+  s.add_dependency 'createsend', '~> 4.1.0'
 
   s.add_development_dependency 'byebug', '8.2.1'
   s.add_development_dependency 'codeclimate-test-reporter'
   s.add_development_dependency 'mime-types', '~> 1.25.1'
   s.add_development_dependency 'pry-byebug', '3.3.0'
   s.add_development_dependency 'rake'
-  s.add_development_dependency 'rspec', '~> 2.14.0'
+  s.add_development_dependency 'rspec', '~> 3.0'
   s.add_development_dependency 'rubocop', '0.37.2'
   s.add_development_dependency 'rubocop-rspec', '1.4.0'
-  s.add_development_dependency 'simplecov', '~> 0.11.2'
+  s.add_development_dependency 'simplecov', '~> 0.13.0'
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 310816d..ea25e74 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,9 +1,9 @@
-require 'codeclimate-test-reporter'
 require 'simplecov'
 SimpleCov.start
-CodeClimate::TestReporter.start
 
 $LOAD_PATH.unshift(File.dirname(__FILE__))
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
 
+require 'active_support'
+require 'active_support/core_ext/object/try'
 require 'create_send_rails'