Gemfile in monetize-1.5.0 vs Gemfile in monetize-1.6.0

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
-gem 'coveralls', require: false
+gem 'coveralls', '>= 0.8.17', require: false
 
 # JSON gem no longer supports ruby < 2.0.0
 if defined?(JRUBY_VERSION)
   gem 'json'
 elsif RUBY_VERSION =~ /^1/