headdesk.gemspec in headdesk-0.8.0 vs headdesk.gemspec in headdesk-0.9.0

@@ -38,7 +38,8 @@
   spec.add_development_dependency 'reek', '~> 5.2'
   spec.add_development_dependency 'rspec', '~> 3.8'
 
   spec.add_dependency 'awesome_print', '~> 1.8'
   spec.add_dependency 'nokogiri', '~> 1.10'
+  spec.add_dependency 'oily_png', '~> 1.2'
   spec.add_dependency 'thor', '~> 0.20'
 end