dockerun.gemspec in dockerun-0.3.4 vs dockerun.gemspec in dockerun-0.3.5

@@ -44,6 +44,7 @@
   # Uncomment to register a new dependency of your gem
   # spec.add_dependency "example-gem", "~> 1.0"
 
   # For more information and examples about making a new gem, checkout our
   # guide at: https://bundler.io/guides/creating_gem.html
+  spec.add_development_dependency 'release-gem'
 end