Gemfile in ierail-0.4.0 vs Gemfile in ierail-0.4.1

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
 gemspec
 
-gem 'coveralls', require: false
-gem 'rake'
\ No newline at end of file
+gem 'coveralls', '~> 0.7', '>= 0.7.1', require: false
+gem 'rake'