goatmail.gemspec in goatmail-1.1.1 vs goatmail.gemspec in goatmail-1.2.0

@@ -18,10 +18,10 @@
   spec.test_files            = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths         = ["lib"]
 
   spec.required_ruby_version = '>= 2.0.0'
 
-  spec.add_dependency "letter_opener"
+  spec.add_dependency "letter_opener", '>= 1.5.0'
   spec.add_dependency "sinatra"
 
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake"
   spec.add_development_dependency 'minitest', "~> 5.3"