diff --git a/sensu-plugins-slack.gemspec b/sensu-plugins-slack.gemspec
index 257e6fa..42199ab 100644
--- a/sensu-plugins-slack.gemspec
+++ b/sensu-plugins-slack.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |s|
   s.test_files             = s.files.grep(%r{^(test|spec|features)/})
   s.version                = SensuPluginsSlack::Version::VER_STRING
 
-  s.add_runtime_dependency 'erubis',         '2.7.0'  
+  s.add_runtime_dependency 'erubis',         '2.7.0'
   s.add_runtime_dependency 'sensu-plugin',   '1.1.0'
 
   s.add_development_dependency 'bundler',                   '~> 1.7'