middleman-xmlvalidator.gemspec in middleman-xmlvalidator-0.0.21 vs middleman-xmlvalidator.gemspec in middleman-xmlvalidator-0.0.22

@@ -23,6 +23,8 @@
   gem.add_development_dependency "rake"
   gem.add_development_dependency "nokogiri", "~>1.5.6"
   gem.add_development_dependency "middleman", "~>3.0.12"
 
   gem.add_dependency "nokogiri", "~>1.5.6"
+  
+  gem.add_runtime_dependency "nokogiri", "~>1.5.6"
 end