Gemfile in rflow-1.0.1 vs Gemfile in rflow-1.1.0

@@ -1,8 +1,9 @@
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
 gemspec
 
 group :development do
   gem 'guard'
   gem 'guard-rspec'
+  gem 'listen', '<3.1'
 end